Arithmetic/Integer: Difference between revisions

Content added Content deleted

Inline

Revision as of 20:44, 1 July 2015

Get two integers from the user, and then output the sum, difference, product, integer quotient and remainder of those numbers. Don't include error handling. For quotient, indicate how it rounds (e.g. towards 0, towards negative infinity, etc.). For remainder, indicate whether its sign matches the sign of the first operand or of the second operand, if they are different.

Also include the exponentiation operator if one exists.

0815

Output:

a = 6, b = 4

a + b = A
a - b = 2
a * b = 18
a / b = 1
a % b = 2
a ^^ b = 510

6502 Assembly

Code is called as a subroutine (i.e. JSR Arithmetic). Specific OS/hardware routines for user input and printing are left unimplemented. <lang 6502asm>Arithmetic: PHA ;push accumulator and X register onto stack TXA PHA JSR GetUserInput ;routine not implemented ;two integers now in memory locations A and B ;addition LDA A CLC ADC B JSR DisplayAddition ;routine not implemented

;subtraction LDA A SEC SBC B JSR DisplaySubtraction ;routine not implemented

;multiplication - overflow not handled LDA A LDX B Multiply: CLC ADC A DEX BNE Multiply JSR DisplayMultiply ;routine not implemented

;division - rounds up LDA A LDX #0 SEC Divide: INX SBC B BCS Divide TXA ;get result into accumulator JSR DisplayDivide ;routine not implemented

;modulus LDA A SEC Modulus: SBC B BCS Modulus ADC B JSR DisplayModulus ;routine not implemented

PLA ;restore accumulator and X register from stack TAX PLA RTS ;return from subroutine</lang> The 6502 has no opcodes for multiplication, division, or modulus; the routines for multiplication, division, and modulus given above can be heavily optimized at the expense of some clarity.

ABAP

<lang ABAP>report zz_arithmetic no standard page heading.

" Read in the two numbers from the user. selection-screen begin of block input.

 parameters: p_first type i,
             p_second type i.

selection-screen end of block input.

" Set the text value that is displayed on input request. at selection-screen output.

 %_p_first_%_app_%-text  = 'First Number: '.
 %_p_second_%_app_%-text = 'Second Number: '.

end-of-selection.

 data: lv_result type i.
 lv_result = p_first + p_second.
 write: / 'Addition:', lv_result.
 lv_result = p_first - p_second.
 write: / 'Substraction:', lv_result.
 lv_result = p_first * p_second.
 write: / 'Multiplication:', lv_result.
 lv_result = p_first div p_second.
 write: / 'Integer quotient:', lv_result. " Truncated towards zero.
 lv_result = p_first mod p_second.
 write: / 'Remainder:',  lv_result.</lang>

ACL2

set-state-ok t

(defun get-two-nums (state)

  (mv-let (_ a state)
          (read-object *standard-oi* state)
     (declare (ignore _))
     (mv-let (_ b state)
             (read-object *standard-oi* state)
        (declare (ignore _))
        (mv a b state))))

(defun integer-arithmetic (state)

  (mv-let (a b state)
          (get-two-nums state)
     (mv state
         (progn$ (cw "Sum:        ~x0~%" (+ a b))
                 (cw "Difference: ~x0~%" (- a b))
                 (cw "Product:    ~x0~%" (* a b))
                 (cw "Quotient:   ~x0~%" (floor a b))
                 (cw "Remainder:  ~x0~%" (mod a b))))))</lang>

Ada

<lang ada>with Ada.Text_Io; with Ada.Integer_Text_IO;

procedure Integer_Arithmetic is

  use Ada.Text_IO;
  use Ada.Integer_Text_Io;

  A, B : Integer;

begin

  Get(A);
  Get(B);
  Put_Line("a+b = " & Integer'Image(A + B));
  Put_Line("a-b = " & Integer'Image(A - B));
  Put_Line("a*b = " & Integer'Image(A * B));
  Put_Line("a/b = " & Integer'Image(A / B) & ", remainder " & Integer'Image(A mod B));  
  Put_Line("a**b = " & Integer'Image(A ** B));

end Integer_Arithmetic;</lang>

Aikido

<lang aikido>var a = 0 var b = 0 stdin -> a // read int from stdin stdin -> b // read int from stdin

println ("a+b=" + (a + b)) println ("a-b=" + (a - b)) println ("a*b=" + (a * b)) println ("a/b=" + (a / b)) println ("a%b=" + (a % b))</lang>

ALGOL 68

Translation of: C

Works with: ALGOL 68 version Revision 1 - no extensions to language used

Works with: ALGOL 68G version Any - tested with release 1.18.0-9h.tiny

<lang algol68>main:(

 LONG INT a=355, b=113;
 printf(($"a+b = "gl$, a + b));
 printf(($"a-b = "gl$, a - b));
 printf(($"a*b = a×b = "gl$, a * b));
 printf(($"a/b = "gl$, a / b));
 printf(($"a OVER b = a%b = a÷b = "gl$, a % b));
 printf(($"a MOD b = a%*b = a%×b = a÷×b = a÷*b = "gl$, a %* b));
 printf(($"a UP b = a**b = a↑b = "gl$, a ** b))

)</lang> Output:

a+b =                                 +468
a-b =                                 +242
a*b = a×b =                               +40115
a/b = +3.141592920353982300884955752e  +0
a OVER b = a%b = a÷b =                                   +3
a MOD b = a%*b = a%×b = a÷×b = a÷*b =                                  +16
a UP b = a**b = a↑b = +1.499007808785573768814747570e+288

ALGOL 68R has the curious (and consequently non-standard) /:= operator. This operator delivers two INTs as a result. eg.

INT quotient:=355, remainder;
remainder := quotient /:= 113;

Giving a quotient of 3, and a remainder of 16.

AmigaE

<lang amigae>PROC main()

 DEF a, b, t
 WriteF('A = ')
 ReadStr(stdin, t)
 a := Val(t)
 WriteF('B = ')
 ReadStr(stdin, t)
 b := Val(t)
 WriteF('A+B=\d\nA-B=\d\n', a+b, a-b)
 WriteF('A*B=\d\nA/B=\d\n', a*b, a/b)
 /* * and / are 16 bit ops; Mul and Div are 32bit ops */
 WriteF('A*B=\d\nA/B=\d\n', Mul(a,b), Div(a,b))
 WriteF('A mod B =\d\n', Mod(a,b))

ENDPROC</lang>

AutoHotkey

The quotient rounds towards 0 if both inputs are integers or towards negative infinity if either input is floating point. The sign of the remainder is always the same as the sign of the first parameter (dividend). <lang autohotkey>Gui, Add, Edit, va, 5 Gui, Add, Edit, vb, -3 Gui, Add, Button, Default, Compute Gui, Show Return

ButtonCompute:

 Gui, Submit
 MsgBox,%
 (Join`s"`n"
  a "+" b " = " a+b
  a "-" b " = " a-b
  a "*" b " = " a*b
  a "//" b " = " a//b " remainder " Mod(a,b)
  a "**" b " = " a**b
 )

fallthrough

GuiClose:

 ExitApp</lang>

AWK

<lang awk>/^[ \t]*-?[0-9]+[ \t]+-?[0-9]+[ \t]*$/ { print "add:", $1 + $2 print "sub:", $1 - $2 print "mul:", $1 * $2 print "div:", int($1 / $2) # truncates toward zero print "mod:", $1 % $2 # same sign as first operand print "exp:", $1 ^ $2 exit }</lang>

For division and modulus, Awk should act like C.

Exponentiation's note: With nawk or gawk, $1 ** $2 acts like $1 ^ $2. With mawk, $1 ** $2 is a syntax error. Nawk allows **, but its manual page only has ^. Gawk's manual warns, "The POSIX standard only specifies the use of `^' for exponentiation. For maximum portability, do not use the `**' operator."

BASIC

Works with: QuickBasic version 4.5

<lang qbasic>function math(a!, b!) print a + b print a - b print a * b print a / b print a mod b end function</lang> Truncate towards: 0

Remainder sign matches: first operand

BASIC256

<lang BASIC256> input "enter a number ?", a input "enter another number ?", b

print "addition " + a + " + " + b + " = " + (a + b) print "subtraction " + a + " - " + b + " = " + (a - b) print "multiplication " + a + " * " + b + " = " + (a * b) print "integer division " + a + " \ " + b + " = " + (a \ b) print "remainder or modulo " + a + " % " + b + " = " + (a % b) print "power " + a + " ^ " + b + " = " + (a ^ b) </lang>

Batch File

Works with: Windows NT version 4 or later (includes Windows XP and onward)

<lang dos> @echo off set /P A=Enter 1st Number : set /P B=Enter 2nd Number : set D=%A% + %B% & call :printC set D=%A% - %B% & call :printC set D=%A% * %B% & call :printC set D=%A% / %B% & call :printC & rem truncates toward 0 set D=%A% %% %B% & call :printC & rem matches sign of 1st operand exit /b

printC

set /A C=%D% echo %D% = %C% </lang>

BBC BASIC

<lang bbcbasic> INPUT "Enter the first integer: " first%

     INPUT "Enter the second integer: " second%
     
     PRINT "The sum is " ; first% + second%
     PRINT "The difference is " ; first% - second%
     PRINT "The product is " ; first% * second%
     PRINT "The integer quotient is " ; first% DIV second% " (rounds towards 0)"
     PRINT "The remainder is " ; first% MOD second% " (sign matches first operand)"
     PRINT "The first raised to the power of the second is " ; first% ^ second%</lang>

bc

<lang bc>define f(a, b) { "add: "; a + b "sub: "; a - b "mul: "; a * b "div: "; a / b /* truncates toward zero */ "mod: "; a % b /* same sign as first operand */ "pow: "; a ^ b }</lang>

Befunge

<lang befunge>&&00p"=A",,:."=B ",,,00g.55+,v

       v,+55.+g00:,,,,"A+B="<
       >"=B-A",,,,:00g-.55+,v
       v,+55.*g00:,,,,"A*B="<
       >"=B/A",,,,:00g/.55+,v
        @,+55.%g00,,,,"A%B="<</lang>

Bracmat

The remainder returned by mod is non-negative. Furthermore, div$(!a.!d)*!d+mod$(!a.!d):!a for all integer !a and !d, !d:~0. <lang Bracmat> ( enter

 =     put$"Enter two integer numbers, separated by space:"
     & get':(~/#?k_~/#?m|quit:?k)
   |     out
       $ "You must enter two integer numbers! Enter \"quit\" if you don't know how to do that."
     & !enter
 )

& !enter & !k:~quit & out$("You entered" !k and !m ". Now look:") & out$("Sum:" !k+!m) & out$("Difference:" !k+-1*!m) & out$("Product:" !k*!m) & out$("Integer division:" div$(!k.!m)) & out$("Remainder:" mod$(!k.!m)) & out$("Exponentiation:" !k^!m) & done; </lang>

Brat

Inspired by the second VBScript version. <lang brat>x = ask("First number: ").to_i y = ask("Second number: ").to_i

Division uses floating point
Remainder uses sign of right hand side

[:+ :- :* :/ :% :^].each { op |

 p "#{x} #{op} #{y} = #{x.call_method op, y}"</lang>

C

<lang c>#include <stdio.h>

include <stdlib.h>

int main(int argc, char *argv[]) {

 int a, b;
 if (argc < 3) exit(1);
 b = atoi(argv[--argc]);
 if (b == 0) exit(2);
 a = atoi(argv[--argc]);
 printf("a+b = %d\n", a+b);
 printf("a-b = %d\n", a-b);
 printf("a*b = %d\n", a*b);
 printf("a/b = %d\n", a/b); /* truncates towards 0 (in C99) */
 printf("a%%b = %d\n", a%b); /* same sign as first operand (in C99) */
 return 0;

}</lang>

C++

<lang cpp>#include <iostream>

int main() {

 int a, b;
 std::cin >> a >> b;
 std::cout << "a+b = " << a+b << "\n";
 std::cout << "a-b = " << a-b << "\n";
 std::cout << "a*b = " << a*b << "\n";
 std::cout << "a/b = " << a/b << ", remainder " << a%b << "\n";
 return 0;

}</lang>

C#

<lang csharp>using System;

class Program {

   static void Main(string[] args)
   {
       int a = Convert.ToInt32(args[0]);
       int b = Convert.ToInt32(args[1]);

       Console.WriteLine("{0} + {1} = {2}", a, b, a + b);
       Console.WriteLine("{0} - {1} = {2}", a, b, a - b);
       Console.WriteLine("{0} * {1} = {2}", a, b, a * b);
       Console.WriteLine("{0} / {1} = {2}", a, b, a / b); // truncates towards 0
       Console.WriteLine("{0} % {1} = {2}", a, b, a % b); // matches sign of first operand
       Console.WriteLine("{0} to the power of {1} = {2}", a, b, Math.Pow(a, b));
   }

}</lang> Sample output:

5 + 3 = 8
5 - 3 = 2
5 * 3 = 15
5 / 3 = 1
5 % 3 = 2
5 to the power of 3 = 125

Chef

<lang Chef>Number Soup.

Only reads single values.

Ingredients. 1 g Numbers 3 g Water 5 g Soup

Method. Take Numbers from refrigerator. Take Soup from refrigerator. Put Numbers into 1st mixing bowl. Add Soup into the 1st mixing bowl. Pour contents of the 1st mixing bowl into 1st baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Remove Soup from 1st mixing bowl. Pour contents of the 1st mixing bowl into 2nd baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Combine Soup into 1st mixing bowl. Pour contents of the 1st mixing bowl into 3rd baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Divide Soup into 1st mixing bowl. Pour contents of the 1st mixing bowl into 4th baking dish. Clean 1st mixing bowl. Put Water into 1st mixing bowl. Verb the Soup. Combine Numbers into 1st mixing bowl. Verb the Soup until verbed. Pour contents of the 1st mixing bowl into 5th baking dish. Clean 1st mixing bowl.

Serves 5.</lang>

Clipper

<lang visualfoxpro>procedure Test( a, b )

  ? "a+b", a + b
  ? "a-b", a - b
  ? "a*b", a * b
  // The quotient isn't integer, so we use the Int() function, which truncates it downward.
  ? "a/b", Int( a / b )
  // Remainder:
  ? "a%b", a % b
  // Exponentiation is also a base arithmetic operation
  ? "a**b", a ** b
  return</lang>

Clojure

<lang clojure>(defn myfunc []

 (println "Enter x and y")
 (let [x (read), y (read)]
   (doseq [op '(+ - * / Math/pow rem)]
     (let [exp (list op x y)]

(printf "%s=%s\n" exp (eval exp))))))</lang>

user=> (myfunc)
Enter x and y
3
6
(+ 3 6)=9
(- 3 6)=-3
(* 3 6)=18
(/ 3 6)=1/2
(Math/pow 3 6)=729.0
(rem 3 6)=3
nil

COBOL

<lang cobol> IDENTIFICATION DIVISION.

      PROGRAM-ID. Int-Arithmetic.

      DATA DIVISION.
      WORKING-STORAGE SECTION.

      01 A      PIC S9(10).
      01 B      PIC S9(10).
      01 Result PIC S9(10).

      PROCEDURE DIVISION.
          DISPLAY "First number: " WITH NO ADVANCING
          ACCEPT A
          DISPLAY "Second number: " WITH NO ADVANCING
          ACCEPT B

*> Note: The various ADD/SUBTRACT/etc. statements can be
*> replaced with COMPUTE statements, which allow those
*> operations to be defined similarly to other languages,
*> e.g. COMPUTE Result = A + B

          ADD A TO B GIVING Result
          DISPLAY "A + B = " Result

          SUBTRACT B FROM A GIVING Result
          DISPLAY "A - B = " Result

          MULTIPLY A BY B GIVING Result
          DISPLAY "A * B = " Result

*> Division here truncates towards zero. DIVIDE can take a
*> ROUNDED clause, which will round the result to the nearest
*> integer.

          DIVIDE A BY B GIVING Result
          DISPLAY "A / B = " Result

          COMPUTE Result = A ^ B
          DISPLAY "A ^ B = " Result

*> Matches sign of first argument.

          DISPLAY "A % B = " FUNCTION REM(A, B)

          GOBACK
          .</lang>

Common Lisp

<lang lisp>(defun arithmetic (&optional (a (read *query-io*)) (b (read *query-io*)))

 (mapc
   (lambda (op)
     (format t "~a => ~a~%" (list op a b) (funcall (symbol-function op) a b)))
   '(+ - * mod rem floor ceiling truncate round expt))
 (values))</lang>

Common Lisp's integer division functions are floor, ceiling, truncate, and round. They differ in how they round their quotient.

The function	rounds its quotient towards
`floor`	negative infinity
`ceiling`	positive infinity
`truncate`	zero
`round`	the nearest integer (preferring the even integer if the mathematical quotient is equidistant from two integers)

Each function also returns a remainder as its secondary value, such that

 quotient * divisor + remainder = dividend .

(mod a b) and (rem a b) return numbers equal to the secondary values of (floor a b) and (truncate a b), respectively.

Component Pascal

Works with Gardens Point Component Pascal <lang oberon2> MODULE Arithmetic; IMPORT CPmain,Console,RTS;

VAR

  x,y	  : INTEGER;
  arg	  : ARRAY 128 OF CHAR;
  status : BOOLEAN;

PROCEDURE Error(IN str : ARRAY OF CHAR); BEGIN

  Console.WriteString(str);Console.WriteLn;
  HALT(1)

END Error;

BEGIN

  IF CPmain.ArgNumber() < 2 THEN Error("Give me two integers!") END;
  CPmain.GetArg(0,arg); RTS.StrToInt(arg,x,status);
  IF ~status THEN Error("Can't convert 	'"+arg+"' to Integer") END;
  CPmain.GetArg(1,arg); RTS.StrToInt(arg,y,status);
  IF ~status THEN Error("Can't convert '"+arg+"' to Integer") END;
  Console.WriteString("x + y >");Console.WriteInt(x + y,6);Console.WriteLn;
  Console.WriteString("x - y >");Console.WriteInt(x - y,6);Console.WriteLn;
  Console.WriteString("x * y >");Console.WriteInt(x * y,6);Console.WriteLn;
  Console.WriteString("x / y >");Console.WriteInt(x DIV y,6);Console.WriteLn;
  Console.WriteString("x MOD y >");Console.WriteInt(x MOD y,6);Console.WriteLn;

END Arithmetic. </lang> command: cprun Arithmetic 12 23
output:

x + y >    35
x - y >   -11
x * y >   276
x / y >     0
x MOD y >    12

Works with BlackBox Component Builder <lang oberon2> MODULE Arithmetic; IMPORT StdLog,DevCommanders,TextMappers;

PROCEDURE DoArithmetic(x,y: INTEGER); BEGIN

       StdLog.String("x + y >");StdLog.Int(x + y);StdLog.Ln;
       StdLog.String("x - y >");StdLog.Int(x - y);StdLog.Ln;
       StdLog.String("x * y >");StdLog.Int(x * y);StdLog.Ln;
       StdLog.String("x / y >");StdLog.Int(x DIV y);StdLog.Ln;
       StdLog.String("x MOD y >");StdLog.Int(x MOD y);StdLog.Ln;

END DoArithmetic;

PROCEDURE Go*; VAR

               params: DevCommanders.Par;
               s: TextMappers.Scanner;
               p : ARRAY 2 OF INTEGER;
               current: INTEGER;

BEGIN

       current := 0;
       params := DevCommanders.par;
       s.ConnectTo(params.text);
       s.SetPos(params.beg);
       s.Scan;
       WHILE(~s.rider.eot) DO
               IF (s.type = TextMappers.int) THEN
                       p[current] := s.int; INC(current);
               END;
               s.Scan;
       END;
       IF current = 2 THEN DoArithmetic(p[0],p[1]) END;

END Go; END Arithmetic. </lang> Command: Arithmetic.Go 12 23 ~
Output:

x + y > 35
x - y > -11
x * y > 276
x / y > 0
x MOD y > 12

D

<lang d>import std.stdio, std.string, std.conv;

void main() {

   int a = 10, b = 20;
   try {
       a = readln().strip().to!int();
       b = readln().strip().to!int();
   } catch (StdioException e) {}
   writeln("a = ", a, ", b = ", b);

   writeln("a + b = ", a + b);
   writeln("a - b = ", a - b);
   writeln("a * b = ", a * b);
   writeln("a / b = ", a / b);
   writeln("a % b = ", a % b);
   writeln("a ^^ b = ", a ^^ b);

}</lang>

Output:

a = -16, b = 5
a + b = -11
a - b = -21
a * b = -80
a / b = -3
a % b = -1
a ^^ b = -1048576

Shorter Version

Same output. <lang d>import std.stdio, std.string, std.conv, std.typetuple;

void main() {

   int a = -16, b = 5;
   try {
       a = readln().strip().to!int();
       b = readln().strip().to!int();
   } catch (StdioException e) {}
   writeln("a = ", a, ", b = ", b);

   foreach (op; TypeTuple!("+", "-", "*", "/", "%", "^^"))
       mixin(`writeln("a ` ~ op ~ ` b = ", a` ~ op ~ `b);`);

}</lang> Division and modulus are defined as in C99.

dc

<lang dc>[Enter 2 integers on 1 line.

 Use whitespace to separate. Example: 2 3
 Use underscore for negative integers. Example: _10

]P ? sb sa [add: ]P la lb + p sz [sub: ]P la lb - p sz [mul: ]P la lb * p sz [div: ]P la lb / p sz [truncates toward zero]sz [mod: ]P la lb % p sz [sign matches first operand]sz [pow: ]P la lb ^ p sz</lang>

DCL

<lang DCL>$ inquire a "Enter first number" $ a = f$integer( a ) $ inquire b "Enter second number" $ b = f$integer( b ) $ write sys$output "a + b = ", a + b $ write sys$output "a - b = ", a - b $ write sys$output "a * b = ", a * b $ write sys$output "a / b = ", a / b ! truncates down</lang>

Output:

$ @arithmetic_integer 
Enter first number: 2
Enter second number: 5
a + b = 7
a - b = -3
a * b = 10
a / b = 0
$ @arithmetic_integer 
Enter first number: -5
Enter second number: -2
a + b = -7
a - b = -3
a * b = 10
a / b = 2

Delphi

<lang Delphi>program IntegerArithmetic;

{$APPTYPE CONSOLE}

uses SysUtils, Math;

var

 a, b: Integer;

begin

 a := StrToInt(ParamStr(1));
 b := StrToInt(ParamStr(2));

 WriteLn(Format('%d + %d = %d', [a, b, a + b]));
 WriteLn(Format('%d - %d = %d', [a, b, a - b]));
 WriteLn(Format('%d * %d = %d', [a, b, a * b]));
 WriteLn(Format('%d / %d = %d', [a, b, a div b])); // rounds towards 0
 WriteLn(Format('%d %% %d = %d', [a, b, a mod b])); // matches sign of the first operand
 WriteLn(Format('%d ^ %d = %d', [a, b, Trunc(Power(a, b))]));

end.</lang>

DWScript

<lang delphi>var a := StrToInt(ParamStr(0)); var b := StrToInt(ParamStr(1));

PrintLn(Format('%d + %d = %d', [a, b, a + b])); PrintLn(Format('%d - %d = %d', [a, b, a - b])); PrintLn(Format('%d * %d = %d', [a, b, a * b])); PrintLn(Format('%d / %d = %d', [a, b, a div b])); PrintLn(Format('%d mod %d = %d', [a, b, a mod b])); PrintLn(Format('%d ^ %d = %d', [a, b, Trunc(Power(a, b))]));</lang>

E

<lang e>def arithmetic(a :int, b :int) {

 return `$\
  Sum:        ${a + b}
  Difference: ${a - b}
  Product:    ${a * b}
  Quotient:   ${a // b}
  Remainder:  ${a % b}$\n`

}</lang>

ECL

<lang ECL> ArithmeticDemo(INTEGER A,INTEGER B) := FUNCTION

 ADDit       := A + B;
 SUBTRACTit  := A - B;
 MULTIPLYit  := A * B;
 INTDIVIDEit := A DIV B; //INTEGER DIVISION
 DIVIDEit    := A / B;   //standard division
 Remainder   := A % B;
 EXPit       := POWER(A,B);
 DS          := DATASET([{A,B,'A PLUS B is:',ADDit},
                         {A,B,'A MINUS B is:',SUBTRACTit},

{A,B,'A TIMES B is:',MULTIPLYit}, {A,B,'A INT DIVIDE BY B is:',INTDIVIDEit}, {A,B,'REMAINDER is:',Remainder}, {A,B,'A DIVIDE BY B is:',DIVIDEit}, {A,B,'A RAISED TO B:',EXPit}], {INTEGER AVal,INTEGER BVal,STRING18 valuetype,STRING val});

 RETURN DS;
 END;

ArithmeticDemo(1,1); ArithmeticDemo(2,2); ArithmeticDemo(50,5); ArithmeticDemo(10,3); ArithmeticDemo(-1,2);

/* NOTE:Division by zero defaults to generating a zero result (0),

  	rather than reporting a “divide by zero” error. 
  	This avoids invalid or unexpected data aborting a long job. 
  	This default behavior can be changed

/

</lang>

Efene

<lang efene>@public run = fn () {

   First = io.get_line("First number: ")
   Second = io.get_line("Second number: ")

   A = list_to_integer(lists.delete($\n, First))
   B = list_to_integer(lists.delete($\n, Second))

   io.format("Sum: ~p~n", [A + B])
   io.format("Difference: ~p~n", [A - B])
   io.format("Product: ~p~n", [A * B])
   io.format("Quotient: ~p~n", [A / B])
   io.format("Remainder: ~p~n", [A % B])

}</lang>

Eiffel

Works with: SmartEiffel version 2.4

In a file called main.e: <lang eiffel>class MAIN

   creation make
   feature make is
       local
           a, b: REAL;
       do
           print("a = ");
           io.read_real;
           a := io.last_real;

           print("b = ");
           io.read_real;
           b := io.last_real;

           print("a + b = ");
           io.put_real(a + b);
           print("%Na - b = ");
           io.put_real(a - b);
           print("%Na * b = ");
           io.put_real(a * b);
           print("%Na / b = ");
           io.put_real(a / b);
           print("%Na %% b = ");
           io.put_real(((a / b) - (a / b).floor) * b);
           print("%Na ^ b = ");
           io.put_real(a.pow(b));
           print("%N");
       end

end</lang> Note that there actually is a builtin modulo operator (\\). However, it seems impossible to use that instruction with SmartEiffel.

Elena

<lang elena>#define system.

define system'math.
define extensions.

// --- Program ---

symbol program =

[

   #var a := console readLine:(Integer new).
   #var b := console readLine:(Integer new).
   
   console writeLine:a:" + ": b:" = ":(a + b).
   console writeLine:a:" - ": b:" = ":(a - b).
   console writeLine:a:" * ": b:" = ":(a * b).
   console writeLine:a:" / ": b:" = ":(a / b).   // truncates towards 0
   console writeLine:a:" % ":b:" = ":(a mod:b). // matches sign of first operand

].</lang>

Erlang

<lang erlang>% Implemented by Arjun Sunel -module(arith). -export([start/0]).

start() ->

  case io:fread("","~d~d") of
      {ok, [A,B]} ->
          io:format("Sum = ~w~n",[A+B]),
          io:format("Difference = ~w~n",[A-B]),
          io:format("Product = ~w~n",[A*B]),
          io:format("Quotient = ~w~n",[A div B]),      % truncates towards zero
          io:format("Remainder= ~w~n",[A rem B]),    % same sign as the first operand
          halt()
  end.

</lang>

ERRE

<lang> PROGRAM INTEGER_ARITHMETIC

! ! for rosettacode.org !

!$INTEGER

BEGIN

 INPUT("Enter a number ",A)
 INPUT("Enter another number ",B)

 PRINT("Addition ";A;"+";B;"=";(A+B))
 PRINT("Subtraction ";A;"-";B;"=";(A-B))
 PRINT("Multiplication ";A;"*";B;"=";(A*B))
 PRINT("Integer division ";A;"div";B;"=";(A DIV B))
 PRINT("Remainder or modulo ";A;"mod";B;"=";(A MOD B))
 PRINT("Power ";A;"^";B;"=";(A^B))

END PROGRAM </lang>

Output:

Enter a number ? 12
Enter another number ? 5
Addition  12 + 5 = 17
Subtraction  12 - 5 = 7
Multiplication  12 * 5 = 60
Integer division  12 div 5 = 2
Remainder or modulo  12 mod 5 = 2
Power  12 ^ 5 = 248832

Truncate towards: 0

Remainder sign matches: first operand

In C-64 ERRE version you must use INT(A/B) for division and A-B*INT(A/B) for modulus.

Euphoria

<lang euphoria>include get.e

integer a,b

a = floor(prompt_number("a = ",{})) b = floor(prompt_number("b = ",{}))

printf(1,"a + b = %d\n", a+b) printf(1,"a - b = %d\n", a-b) printf(1,"a * b = %d\n", a*b) printf(1,"a / b = %g\n", a/b) -- does not truncate printf(1,"remainder(a,b) = %d\n", remainder(a,b)) -- same sign as first operand printf(1,"power(a,b) = %g\n", power(a,b))</lang>

Output:

a = 2
b = 3
a + b = 5
a - b = -1
a * b = 6
a / b = 0.666667
remainder(a,b) = 2
power(a,b) = 8

Excel

If the numbers are typed into cells A1 and B1

For sum, type in C1 <lang excel> =$A1+$B1 </lang>

For difference, type in D1 <lang excel> =$A1-$B1 </lang>

For product, type in E1 <lang excel> =$A1*$B1 </lang>

For quotient, type in F1 <lang excel> =QUOTIENT($A1,$B1) </lang>

For remainder, type in G1 <lang excel> =MOD($A1,$B1) </lang>

For exponentiation, type in H1 <lang excel> =$A1^$B1 </lang>

Factor

<lang factor>USING: combinators io kernel math math.functions math.order math.parser prettyprint ;

"a=" "b=" [ write readln string>number ] bi@ {

   [ + "sum: " write . ]
   [ - "difference: " write . ] 
   [ * "product: " write . ]
   [ / "quotient: " write . ]
   [ /i "integer quotient: " write . ]
   [ rem "remainder: " write . ]
   [ mod "modulo: " write . ]
   [ max "maximum: " write . ]
   [ min "minimum: " write . ]
   [ gcd "gcd: " write . drop ]
   [ lcm "lcm: " write . ]

} 2cleave</lang>

output:

<lang factor>a=8 b=12 sum: 20 difference: -4 product: 96 quotient: 2/3 integer quotient: 0 remainder: 8 modulo: 8 maximum: 12 minimum: 8 gcd: 4 lcm: 24</lang>

This example illustrates the use of cleave and apply combinators to alleviate the usage of shuffle words in a concatenative language. bi@ applies a quotation to 2 inputs and 2cleave applies a sequence of quotations to 2 inputs.

FALSE

<lang false>12 7 \$@$@$@$@$@$@$@$@$@$@\ { 6 copies } "sum = "+." difference = "-." product = "*." quotient = "/." modulus = "/*-." "</lang>

Forth

To keep the example simple, the word takes the two numbers from the stack. /mod returns two results; the stack effect is ( a b -- a%b a/b ). <lang forth>: arithmetic ( a b -- )

 cr ." a=" over . ." b=" dup .
 cr ." a+b=" 2dup + .
 cr ." a-b=" 2dup - .
 cr ." a*b=" 2dup * .
 cr ." a/b=" /mod .
 cr ." a mod b = " . cr ;</lang>

Different host systems have different native signed division behavior. ANS Forth defines two primitive double-precision signed division operations, from which the implementation may choose the most natural to implement the basic divide operations ( / , /mod , mod , */ ). This is partly due to differing specifications in the two previous standards, Forth-79 and Forth-83.

<lang forth>FM/MOD ( d n -- mod div ) \ floored SM/REM ( d n -- rem div ) \ symmetric M* ( n n -- d )</lang>

In addition, there are unsigned variants.

Fortran

In ANSI FORTRAN 77 or later: <lang fortran> INTEGER A, B

PRINT *, 'Type in two integer numbers separated by white space',

+ ' and press ENTER'

READ *, A, B
PRINT *, '   A + B = ', (A + B)
PRINT *, '   A - B = ', (A - B)
PRINT *, '   A * B = ', (A * B)
PRINT *, '   A / B = ', (A / B)
PRINT *, 'MOD(A,B) = ', MOD(A,B)
PRINT *
PRINT *, 'Even though you did not ask, ',

+ 'exponentiation is an intrinsic op in Fortran, so...'

PRINT *, '  A ** B = ', (A ** B)
END</lang>

F#

As F# is a functional language, we can easily create a list of pairs of the string name of a function and the function itself to iterate over printing the operation and applying the function to obtain the result: <lang fsharp> do

 let a, b = int Sys.argv.[1], int Sys.argv.[2]
 for str, f in ["+", ( + ); "-", ( - ); "*", ( * ); "/", ( / ); "%", ( % )] do
   printf "%d %s %d = %d\n" a str b (f a b)

</lang> For example, the output with the arguments 4 and 3 is: <lang fsharp> 4 + 3 = 7 4 - 3 = 1 4 * 3 = 12 4 / 3 = 1 4 % 3 = 1 </lang>

friendly interactive shell

<lang fishshell> read a read b echo 'a + b =' (math "$a + $b") # Sum echo 'a - b =' (math "$a - $b") # Difference echo 'a * b =' (math "$a * $b") # Product echo 'a / b =' (math "$a / $b") # Integer quotient echo 'a % b =' (math "$a % $b") # Remainder echo 'a ^ b =' (math "$a ^ $b") # Exponentation </lang>

Frink

This demonstrates normal division (which produces rational numbers when possible), div, and mod. div rounds toward negative infinity (defined as floor[x/y]). mod uses the sign of the second number (defined as x - y * floor[x/y]). All operators automatically produce big integers or exact rational numbers when necessary. <lang frink> [a,b] = input["Enter numbers",["a","b"]] ops=["+", "-", "*", "/", "div" ,"mod" ,"^"] for op = ops {

  str = "$a $op $b"
  println["$str = " + eval[str]]

} </lang>

Output is: <lang frink> 10 + 20 = 30 10 - 20 = -10 10 * 20 = 200 10 / 20 = 1/2 (exactly 0.5) 10 div 20 = 0 10 mod 20 = 10 10 ^ 20 = 100000000000000000000 </lang>

GAP

<lang gap>run := function()

 local a, b, f;
 f := InputTextUser();
 Print("a =\n");
 a := Int(Chomp(ReadLine(f)));
 Print("b =\n");
 b := Int(Chomp(ReadLine(f)));
 Display(Concatenation(String(a), " + ", String(b), " = ", String(a + b)));
 Display(Concatenation(String(a), " - ", String(b), " = ", String(a - b)));
 Display(Concatenation(String(a), " * ", String(b), " = ", String(a * b)));
 Display(Concatenation(String(a), " / ", String(b), " = ", String(QuoInt(a, b)))); # toward 0
 Display(Concatenation(String(a), " mod ", String(b), " = ", String(RemInt(a, b)))); # nonnegative
 Display(Concatenation(String(a), " ^ ", String(b), " = ", String(a ^ b)));
 CloseStream(f);

end;</lang>

GEORGE

Go

<lang go>package main

import "fmt"

func main() {

   var a, b int
   fmt.Print("enter two integers: ")
   fmt.Scanln(&a, &b)
   fmt.Printf("%d + %d = %d\n", a, b, a+b)
   fmt.Printf("%d - %d = %d\n", a, b, a-b)
   fmt.Printf("%d * %d = %d\n", a, b, a*b)
   fmt.Printf("%d / %d = %d\n", a, b, a/b)  // truncates towards 0
   fmt.Printf("%d %% %d = %d\n", a, b, a%b) // same sign as first operand
   // no exponentiation operator

}</lang> Example run:

enter two integers: -5 3
-5 + 3 = -2
-5 - 3 = -8
-5 * 3 = -15
-5 / 3 = -1
-5 % 3 = -2

Groovy

<lang groovy>def arithmetic = { a, b ->

   println """
      a + b =        ${a} + ${b} = ${a + b}
      a - b =        ${a} - ${b} = ${a - b}
      a * b =        ${a} * ${b} = ${a * b}
      a / b =        ${a} / ${b} = ${a / b}   !!! Converts to floating point!

(int)(a / b) = (int)(${a} / ${b}) = ${(int)(a / b)} !!! Truncates downward after the fact

a.intdiv(b) =  ${a}.intdiv(${b}) = ${a.intdiv(b)}              !!! Behaves as if truncating downward, actual implementation varies
      a % b =        ${a} % ${b} = ${a % b}

Exponentiation is also a base arithmetic operation in Groovy, so:

     a ** b =       ${a} ** ${b} = ${a ** b}

""" }</lang>

Program: <lang groovy>arithmetic(5,3)</lang>

Output:

       a + b =        5 + 3 = 8
       a - b =        5 - 3 = 2
       a * b =        5 * 3 = 15
       a / b =        5 / 3 = 1.6666666667   !!! Converts to floating point!
(int)(a / b) = (int)(5 / 3) = 1              !!! Truncates downward after the fact
 a.intdiv(b) =  5.intdiv(3) = 1              !!! Behaves as if truncating downward, actual implementation varies
       a % b =        5 % 3 = 2

Exponentiation is also a base arithmetic operation in Groovy, so:
      a ** b =       5 ** 3 = 125

Harbour

<lang visualfoxpro>procedure Test( a, b )

  ? "a+b", a + b
  ? "a-b", a - b
  ? "a*b", a * b
  // The quotient isn't integer, so we use the Int() function, which truncates it downward.
  ? "a/b", Int( a / b )
  // Remainder:
  ? "a%b", a % b
  // Exponentiation is also a base arithmetic operation
  ? "a**b", a ** b
  return</lang>

Haskell

<lang haskell>main = do

 a <- readLn :: IO Integer
 b <- readLn :: IO Integer
 putStrLn $ "a + b = " ++ show (a + b)
 putStrLn $ "a - b = " ++ show (a - b)
 putStrLn $ "a * b = " ++ show (a * b)
 putStrLn $ "a to the power of b = " ++ show (a ** b)
 putStrLn $ "a to the power of b = " ++ show (a ^ b)
 putStrLn $ "a to the power of b = " ++ show (a ^^ b)
 putStrLn $ "a `div` b = "  ++ show (a `div` b)  -- truncates towards negative infinity
 putStrLn $ "a `mod` b = "  ++ show (a `mod` b)  -- same sign as second operand
 putStrLn $ "a `divMod` b = "  ++ show (a `divMod` b)
 putStrLn $ "a `quot` b = " ++ show (a `quot` b) -- truncates towards 0
 putStrLn $ "a `rem` b = "  ++ show (a `rem` b)  -- same sign as first operand
 putStrLn $ "a `quotRem` b = "  ++ show (a `quotRem` b)</lang>

Haxe

<lang haxe>class BasicIntegerArithmetic {

   public static function main() {
       var args =Sys.args();
       if (args.length < 2) return;
       var a = Std.parseFloat(args[0]);
       var b = Std.parseFloat(args[1]);
       trace("a+b = " + (a+b));
       trace("a-b = " + (a-b));
       trace("a*b = " + (a*b));
       trace("a/b = " + (a/b));
       trace("a%b = " + (a%b));
   }

}</lang>

HicEst

All numeric is 8-byte-float. Conversions are by INT, NINT, FLOOR, CEILING, or Formatted IO <lang hicest>DLG(Edit=A, Edit=B, TItle='Enter numeric A and B') WRITE(Name) A, B WRITE() ' A + B = ', A + B WRITE() ' A - B = ', A - B WRITE() ' A * B = ', A * B WRITE() ' A / B = ', A / B ! no truncation WRITE() 'truncate A / B = ', INT(A / B) ! truncates towards 0 WRITE() 'round next A / B = ', NINT(A / B) ! truncates towards next integer WRITE() 'round down A / B = ', FLOOR(A / B) ! truncates towards minus infinity WRITE() 'round up A / B = ', CEILING(A / B) ! truncates towards plus infinity WRITE() 'remainder of A / B = ', MOD(A, B) ! same sign as A WRITE() 'A to the power of B = ', A ^ B WRITE() 'A to the power of B = ', A ** B</lang> <lang hicest>A=5; B=-4;

             A + B = 1 
             A - B = 9 
             A * B = -20 
             A / B = -1.25

truncate A / B = -1 round next A / B = -1 round down A / B = -2 round up A / B = -1 remainder of A / B = 1 A to the power of B = 16E-4 A to the power of B = 16E-4 </lang>

Icon and Unicon

<lang Icon>procedure main() writes("Input 1st integer a := ") a := integer(read()) writes("Input 2nd integer b := ") b := integer(read())

write(" a + b = ",a+b) write(" a - b = ",a-b) write(" a * b = ",a*b) write(" a / b = ",a/b, " rounds toward 0") write(" a % b = ",a%b, " remainder sign matches a") write(" a ^ b = ",a^b) end</lang>

Inform 7

<lang inform7>Enter Two Numbers is a room.

Numerically entering is an action applying to one number. Understand "[number]" as numerically entering.

The first number is a number that varies.

After numerically entering for the first time: now the first number is the number understood.

After numerically entering for the second time: let A be the first number; let B be the number understood; say "[A] + [B] = [A + B]."; [operator syntax] say "[A] - [B] = [A minus B]."; [English syntax] let P be given by P = A * B where P is a number; [inline equation] say "[A] * [B] = [P]."; let Q be given by the Division Formula; [named equation] say "[A] / [B] = [Q]."; say "[A] mod [B] = [remainder after dividing A by B]."; end the story.

Equation - Division Formula Q = A / B where Q is a number, A is a number, and B is a number.</lang>

This solution shows four syntaxes: mathematical operators, English operators, inline equations, and named equations. Division rounds toward zero, and the remainder has the same sign as the quotient.

J

<lang j>calc =: + , - , * , <.@% , |~ , ^</lang> The function calc constructs a list of numeric results for this task. <lang j> 17 calc 3 20 14 51 5 2 4913</lang>

The function bia assembles these results, textually:

<lang j>labels =: ];.2 'Sum: Difference: Product: Quotient: Remainder: Exponentiation: ' combine =: ,. ":@,. bia =: labels combine calc

  17 bia 3

Sum: 20 Difference: 14 Product: 51 Quotient: 5 Remainder: 2 Exponentiation: 4913</lang>

Java

<lang java>import java.util.Scanner; public class Int{

 public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int a = sc.nextInt();
   int b = sc.nextInt();
 
   int sum = a + b;//integer addition is discouraged in print statements due to confusion with String concatenation
   System.out.println("a + b = " + sum);
   System.out.println("a - b = " + (a - b));
   System.out.println("a * b = " + (a * b));
   System.out.println("quotient of a / b = " + (a / b)); // truncates towards 0
   System.out.println("remainder of a / b = " + (a % b)); // same sign as first operand
 }

}</lang>

JavaScript

Works with: JScript

Works with: SpiderMonkey

Note that the operators work the same in all versions of JavaScript; the requirement for specific implementations is in order to get user input. <lang javascript>var a = parseInt(get_input("Enter an integer"), 10); var b = parseInt(get_input("Enter an integer"), 10);

WScript.Echo("a = " + a); WScript.Echo("b = " + b); WScript.Echo("sum: a + b = " + (a + b)); WScript.Echo("difference: a - b = " + (a - b)); WScript.Echo("product: a * b = " + (a * b)); WScript.Echo("quotient: a / b = " + (a / b | 0)); // "| 0" casts it to an integer WScript.Echo("remainder: a % b = " + (a % b));

function get_input(prompt) {

   output(prompt);
   try {
       return WScript.StdIn.readLine();
   } catch(e) {
       return readline();
   }

} function output(prompt) {

   try {
       WScript.Echo(prompt);
   } catch(e) {
       print(prompt);
   }

}</lang> output:

Enter an integer
-147
Enter an integer
63
a = -147
b = 63
sum: a + b = -84
difference: a - b = -210
product: a * b = -9261
quotient: a / b = -2
remainder: a % b = -21

jq

<lang jq># Lines which do not have two integers are skipped:

def arithmetic:

 split(" ") | select(length > 0) | map(tonumber)
 | if length > 1 then
   .[0] as $a | .[1] as $b
   | "For a = \($a) and b = \($b):\n" +
     "a + b = \($a + $b)\n" +
     "a - b = \($a - $b)\n" +
     "a * b = \($a * $b)\n" +
     "a/b|floor = \($a / $b | floor)\n" +
     "a % b = \($a % $b)\n" +
     "a | exp = \($a | exp)\n"
   else empty
   end ;

arithmetic </lang>

Output:

$ jq -R -r -f arithmetic.jq
7 -2
For a = 7 and b = -2:
a + b = 5
a - b = 9
a * b = -14
a/b|floor = -4
a % b = 1
a | exp = 1096.6331584284585

2 -7
For a = 2 and b = -7:
a + b = -5
a - b = 9
a * b = -14
a/b|floor = -1
a % b = 2
a | exp = 7.38905609893065

-2 -7
For a = -2 and b = -7:
a + b = -9
a - b = 5
a * b = 14
a/b|floor = 0
a % b = -2
a | exp = 0.1353352832366127

Julia

<lang Julia>function arithmetic (a = int(readline()), b = int(readline()))

 for op in  [+,-,*,div,rem]
   println("a $op b = $(op(a,b))")
 end

end</lang>

Output:

julia> arithmetic()
4
5
a + b = 9
a - b = -1
a * b = 20
a div b = 0
a rem b = 4

LabVIEW

This image is a VI Snippet, an executable image of LabVIEW code. The LabVIEW version is shown on the top-right hand corner. You can download it, then drag-and-drop it onto the LabVIEW block diagram from a file browser, and it will appear as runnable, editable code.

Lasso

<lang Lasso>local(a = 6, b = 4)

a + #b // 10
a - #b // 2
a * #b // 24
a / #b // 1
a % #b // 2

math_pow(#a,#b) // 1296 math_pow(#b,#a) // 4096</lang>

LFE

<lang lisp> (defmodule arith

 (export all))

(defun demo-arith ()

 (case (: io fread '"Please enter two integers: " '"~d~d")
   ((tuple 'ok (a b))
     (: io format '"~p + ~p = ~p~n" (list a b (+ a b)))
     (: io format '"~p - ~p = ~p~n" (list a b (- a b)))
     (: io format '"~p * ~p = ~p~n" (list a b (* a b)))
     (: io format '"~p^~p = ~p~n" (list a b (: math pow a b)))
     ; div truncates towards zero
     (: io format '"~p div ~p = ~p~n" (list a b (div a b)))
     ; rem's result takes the same sign as the first operand
     (: io format '"~p rem ~p = ~p~n" (list a b (rem a b))))))

</lang>

Usage from the LFE REPL: <lang lisp> > (slurp '"arith.lfe")

(ok arith)

> (demo-arith) Please enter two integers: 2 8 2 + 8 = 10 2 - 8 = -6 2 * 8 = 16 2^8 = 256.0 2 div 8 = 0 2 rem 8 = 2 ok </lang>

Liberty BASIC

Note that raising to a power can display very large integers without going to approximate power-of-ten notation. <lang lb> input "Enter the first integer: "; first input "Enter the second integer: "; second

print "The sum is " ; first + second print "The difference is " ; first -second print "The product is " ; first *second if second <>0 then print "The integer quotient is " ; int( first /second); " (rounds towards 0)" else print "Division by zero not allowed." print "The remainder is " ; first MOD second; " (sign matches first operand)" print "The first raised to the power of the second is " ; first ^second </lang>

Logo

<lang logo>to operate :a :b

 (print [a =] :a)
 (print [b =] :b)
 (print [a + b =] :a + :b)
 (print [a - b =] :a - :b)
 (print [a * b =] :a * :b)
 (print [a / b =] int :a / :b)
 (print [a mod b =] modulo :a :b)

end</lang>

Each infix operator also has a prefix synonym (sum, difference, product, quotient). Sum and product can also have arity greater than two when used in parentheses (sum 1 2 3). Infix operators in general have high precedence; you may need to enclose their arguments in parentheses to obtain the correct expression.

LSE64

<lang lse64>over : 2 pick 2dup : over over

arithmetic : \

 " A=" ,t over , sp " B=" ,t dup , nl \
 " A+B=" ,t 2dup + , nl \
 " A-B=" ,t 2dup - , nl \
 " A*B=" ,t 2dup * , nl \
 " A/B=" ,t 2dup / , nl \
 " A%B=" ,t      % , nl</lang>

Lua

<lang lua>local x = io.read() local y = io.read()

print ("Sum: " , (x + y)) print ("Difference: ", (x - y)) print ("Product: " , (x * y)) print ("Quotient: " , (x / y)) -- Does not truncate print ("Remainder: " , (x % y)) -- Result has sign of right operand print ("Exponent: " , (x ^ y))</lang>

M4

Because of the particular nature of M4, the only user-input is the code itself. Anyway the following code can be used: <lang m4>eval(A+B) eval(A-B) eval(A*B) eval(A/B) eval(A%B)</lang>

once saved in a file, e.g. operations.m4:

m4 -DA=4 -DB=6 operations.m4

or using a sort of driver:

<lang m4>define(`A', 4)dnl define(`B', 6)dnl include(`operations.m4')</lang>

Maple

These operations are all built-in. As all operations are exact, there are no rounding issues involved. <lang Maple> DoIt := proc()

       local a := readstat( "Input an integer: " ):
       local b := readstat( "Input another integer: " ):
       printf( "Sum = %d\n",  a + b ):
       printf( "Difference = %d\n",  a - b ):
       printf( "Product = %d\n",  a * b ):
       printf( "Quotient = %d\n",  iquo( a, b, 'c' ) ):
       printf( "Remainder = %d\n", c ); # or irem( a, b )
       NULL # quiet return

end proc: </lang> Here is an example of calling DoIt. <lang Maple> > DoIt(); Input an integer: 15; Input another integer: 12; Sum = 27 Difference = 3 Product = 180 Quotient = 1 Remainder = 3 > </lang>

Mathematica

Mathematica has all the function built-in to handle this task. Example: <lang Mathematica>a = Input["Give me an integer please!"]; b = Input["Give me another integer please!"]; Print["You gave me ", a, " and ", b]; Print["sum: ", a + b]; Print["difference: ", a - b]; Print["product: ", a b]; Print["integer quotient: ", IntegerPart[a/b]]; Print["remainder: ", Mod[a, b]]; Print["exponentiation: ", a^b];</lang> gives back for input 17 and 3: <preMathematica>You gave me 17 and 3 sum: 20 difference: 14 product: 51 integer quotient: 5 remainder: 2

exponentiation: 4913

MATLAB / Octave

<lang octave>disp("integer a: "); a = scanf("%d", 1); disp("integer b: "); b = scanf("%d", 1); a+b a-b a*b floor(a/b) mod(a,b) a^b</lang>

Maxima

<lang maxima>block(

  [a: read("a"), b: read("b")],
  print(a + b),
  print(a - b),
  print(a * b),
  print(a / b),
  print(quotient(a, b)),
  print(remainder(a, b)),
  a^b

);</lang>

MAXScript

<lang maxscript>x = getKBValue prompt:"First number" y = getKBValue prompt:"Second number:"

format "Sum: %\n" (x + y) format "Difference: %\n" (x - y) format "Product: %\n" (x * y) format "Quotient: %\n" (x / y) format "Remainder: %\n" (mod x y)</lang>

Mercury

<lang>

- module arith_int.

- interface.

- import_module io.

- pred main(io::di, io::uo) is det.

- implementation.

- import_module int, list, string.

main(!IO) :-

   io.command_line_arguments(Args, !IO),
   ( if
       Args = [AStr, BStr],
       string.to_int(AStr, A),
       string.to_int(BStr, B)
     then
       io.format("A + B = %d\n", [i(A + B)], !IO),
       io.format("A - B = %d\n", [i(A - B)], !IO),
       io.format("A * B = %d\n", [i(A * B)], !IO),

       % Division: round towards zero.
       %
       io.format("A / B = %d\n", [i(A / B)], !IO),

       % Division: round towards minus infinity.
       %
       io.format("A div B = %d\n", [i(A div B)], !IO), 
   
       % Modulus: X mod Y = X - (X div Y) * Y.
       %
       io.format("A mod B = %d\n", [i(A mod B)], !IO),

       % Remainder: X rem Y = X - (X / Y) * Y.
       %
       io.format("A rem B = %d\n", [i(A rem B)], !IO),

       % Exponentiation is done using the function int.pow/2.
       %
       io.format("A `pow` B = %d\n", [i(A `pow` B)], !IO)
     else
       io.set_exit_status(1, !IO)
   ).

</lang>

Metafont

<lang metafont>string s[]; message "input number a: "; s1 := readstring; message "input number b: "; s2 := readstring; a := scantokens s1; b := scantokens s2;

def outp(expr op) =

 message "a " & op & " b = " & decimal(a scantokens(op) b) enddef;

outp("+"); outp("-"); outp("*"); outp("div"); outp("mod");

end</lang>

МК-61/52

ML/I

ML/I will read two integers from 'standard input' or similar, and then output the results to 'standard output' or similar.

<lang ML/I>MCSKIP "WITH" NL "" Arithmetic/Integer "" assumes macros on input stream 1, terminal on stream 2 MCSKIP MT,<> MCINS %. MCDEF SL SPACES NL AS <MCSET T1=%A1. MCSET T2=%A2. a + b = %%T1.+%T2.. a - b = %%T1.-%T2.. a * b = %%T1.*%T2.. a / b = %%T1./%T2.. a rem b = %%T1.-%%%T1./%T2..*%T2... Division is truncated to the greatest integer that does not exceed the exact result. Remainder matches the sign of the second operand, if the signs differ.</lang>

Modula-2

<lang modula2>MODULE ints;

IMPORT InOut;

VAR a, b : INTEGER;

BEGIN

 InOut.WriteString ("Enter two integer numbers : ");   InOut.WriteBf;
 InOut.ReadInt (a);
 InOut.ReadInt (b);
 InOut.WriteString ("a + b   = ");  InOut.WriteInt (a + b, 9);    InOut.WriteLn;
 InOut.WriteString ("a - b   = ");  InOut.WriteInt (a - b, 9);    InOut.WriteLn;
 InOut.WriteString ("a * b   = ");  InOut.WriteInt (a * b, 9);    InOut.WriteLn;
 InOut.WriteString ("a / b   = ");  InOut.WriteInt (a DIV b, 9);  InOut.WriteLn;
 InOut.WriteString ("a MOD b = ");  InOut.WriteInt (a MOD b, 9);  InOut.WriteLn;
 InOut.WriteLn;

END ints.</lang>Producing:

$$ ints
Enter two integer numbers : 12 7
a + b   =        19
a - b   =         5
a * b   =        84
a / b   =         1
a MOD b =         5

$$ ints
Enter two integer numbers : 123 -111
a + b   =        12
a - b   =       234
a * b   =    -13653
a / b   =        -1
a MOD b =        12

Modula-3

<lang modula3>MODULE Arith EXPORTS Main;

IMPORT IO, Fmt;

VAR a, b: INTEGER;

BEGIN

 a := IO.GetInt();
 b := IO.GetInt();
 IO.Put("a+b = " & Fmt.Int(a + b) & "\n");
 IO.Put("a-b = " & Fmt.Int(a - b) & "\n");
 IO.Put("a*b = " & Fmt.Int(a * b) & "\n");
 IO.Put("a DIV b = " & Fmt.Int(a DIV b) & "\n");
 IO.Put("a MOD b = " & Fmt.Int(a MOD b) & "\n");

END Arith.</lang>

MUMPS

Note: M[UMPS] has an operator called "modulo". When both operands are positive numbers, "modulo" has a result that looks a lot like "remainder"; however, there is an important difference.

To better understand the intricacies of "modulo" and how it is different from "remainder", see Donald Knuth's definition (Volume 1 of the "big books"), or find out the beauty of cyclic algebra as formulated by Niels Henrik Abel (August 5, 1802 – April 6, 1829).

<lang MUMPS>Arith(first,second) ; Mathematical operators Write "Plus",?12,first,"+",second,?25," = ",first+second,! Write "Minus",?12,first,"-",second,?25," = ",first-second,! Write "Multiply",?12,first,"*",second,?25," = ",first*second,! Write "Divide",?12,first,"/",second,?25," = ",first/second,! Write "Int Divide",?12,first,"\",second,?25," = ",first\second,! Write "Power",?12,first,"**",second,?25," = ",first**second,! Write "Modulo",?12,first,"#",second,?25," = ",first#second,! Write "And",?12,first,"&",second,?25," = ",first&second,! Write "Or",?12,first,"!",second,?25," = ",first!second,! Quit

Do Arith(2,3) Plus 2+3 = 5 Minus 2-3 = -1 Multiply 2*3 = 6 Divide 2/3 = .6666666666666666667 Int Divide 2\3 = 0 Power 2**3 = 8 Modulo 2#3 = 2 And 2&3 = 1 Or 2!3 = 1

Do Arith(16,0.5) Plus 16+.5 = 16.5 Minus 16-.5 = 15.5 Multiply 16*.5 = 8 Divide 16/.5 = 32 Int Divide 16\.5 = 32 Power 16**.5 = 4 Modulo 16#.5 = 0 And 16&.5 = 1 Or 16!.5 = 1

Do Arith(0,2) Plus 0+2 = 2 Minus 0-2 = -2 Multiply 0*2 = 0 Divide 0/2 = 0 Int Divide 0\2 = 0 Power 0**2 = 0 Modulo 0#2 = 0 And 0&2 = 0 Or 0!2 = 1</lang>

Nemerle

Adapted nearly verbatim from C# solution above. Note that I've used the exponentiation operator (**), but Math.Pow() as used in the C# solution would also work. <lang Nemerle>using System;

class Program {

   static Main(args : array[string]) : void
   {
       def a = Convert.ToInt32(args[0]);
       def b = Convert.ToInt32(args[1]);

       Console.WriteLine("{0} + {1} = {2}", a, b, a + b);
       Console.WriteLine("{0} - {1} = {2}", a, b, a - b);
       Console.WriteLine("{0} * {1} = {2}", a, b, a * b);
       Console.WriteLine("{0} / {1} = {2}", a, b, a / b); // truncates towards 0
       Console.WriteLine("{0} % {1} = {2}", a, b, a % b); // matches sign of first operand
       Console.WriteLine("{0} ** {1} = {2}", a, b, a ** b);
   }

}</lang>

NetRexx

Translation of: REXX

<lang NetRexx>/* NetRexx */

options replace format comments java crossref savelog symbols binary

say "enter 2 integer values separated by blanks" parse ask a b say a "+" b "=" a + b say a "-" b "=" a - b say a "*" b "=" a * b say a "/" b "=" a % b "remaining" a // b "(sign from first operand)" say a "^" b "=" a ** b

return </lang>

Output

enter 2 integer values separated by blanks
17 -4
17 + -4 = 13
17 - -4 = 21
17 * -4 = -68
17 / -4 = -4 remaining 1 (sign from first operand)
17 ^ -4 = 0.0000119730367

NewLISP

<lang NewLISP>; integer.lsp

oofoe 2012-01-17

(define (aski msg) (print msg) (int (read-line))) (setq x (aski "Please type in an integer and press [enter]: ")) (setq y (aski "Please type in another integer : "))

Note that +, -, *, / and % are all integer operations.

(println) (println "Sum: " (+ x y)) (println "Difference: " (- x y)) (println "Product: " (* x y)) (println "Integer quotient (rounds to 0): " (/ x y)) (println "Remainder: " (setq r (% x y)))

(println "Remainder sign matches: " (cond ((= (sgn r) (sgn x) (sgn y)) "both") ((= (sgn r) (sgn x)) "first") ((= (sgn r) (sgn y)) "second")))

(println) (println "Exponentiation: " (pow x y))

(exit) ; NewLisp normally goes to listener after running script. </lang>

Sample output:

Please type in an integer and press [enter]: 17
Please type in another integer             : -4

Sum: 13
Difference: 21
Product: -68
Integer quotient (rounds to 0): -4
Remainder: 1
Remainder sign matches: first

Exponentiation: 1.197303672e-005

Nim

<lang nim> import parseopt,strutils

var

 opt: TOptParser = initOptParser()
 str = opt.cmdLineRest.split
 a: int = 0
 b: int = 0

try:

 a = parseInt(str[0])
 b = parseInt(str[1])

except EinvalidValue:

 quit("Invalid params. Two integers are expected.")

echo ("a : " & $a) echo ("b : " & $b) echo ("a + b : " & $(a+b)) echo ("a - b : " & $(a-b)) echo ("a * b : " & $(a*b)) echo ("a div b: " & $(a div b)) echo ("a mod b: " & $(a mod b)) </lang> Execute: Aritmint 10 23
/ Output:

a      : 10
b      : 23
a + b  : 33
a - b  : -13
a * b  : 230
a div b: 0
a mod b: 10

NSIS

All Arithmetic in NSIS is handled by the IntOp instruction. It is beyond the scope of this task to implement user input (a fairly involved task), so I will be providing hard-coded values simulating the user input, with the intention of later adding the user-input piece. <lang nsis>Function Arithmetic Push $0 Push $1 Push $2 StrCpy $0 21 StrCpy $1 -2

IntOp $2 $0 + $1 DetailPrint "$0 + $1 = $2" IntOp $2 $0 - $1 DetailPrint "$0 - $1 = $2" IntOp $2 $0 * $1 DetailPrint "$0 * $1 = $2" IntOp $2 $0 / $1 DetailPrint "$0 / $1 = $2" DetailPrint "Rounding is toward negative infinity" IntOp $2 $0 % $1 DetailPrint "$0 % $1 = $2" DetailPrint "Sign of remainder matches the first number"

Pop $2 Pop $1 Pop $0 FunctionEnd</lang>

Oberon-2

Oxford Oberon-2 <lang oberon2> MODULE Arithmetic; IMPORT In, Out; VAR

       x,y:INTEGER;

BEGIN

       Out.String("Give two numbers: ");In.Int(x);In.Int(y);
       Out.String("x + y >");Out.Int(x + y,6);Out.Ln;
       Out.String("x - y >");Out.Int(x - y,6);Out.Ln;
       Out.String("x * y >");Out.Int(x * y,6);Out.Ln;
       Out.String("x / y >");Out.Int(x DIV y,6);Out.Ln;
       Out.String("x MOD y >");Out.Int(x MOD y,6);Out.Ln;

END Arithmetic. </lang> Output:

Give two numbers: 12 23
x + y >    35
x - y >   -11
x * y >   276
x / y >     0
x MOD y >    12

Objeck

<lang objeck>bundle Default {

 class Arithmetic {
   function : Main(args : System.String[]) ~ Nil {
     DoArithmetic();
   }

   function : native : DoArithmetic() ~ Nil {
     a := IO.Console->GetInstance()->ReadString()->ToInt();
     b := IO.Console->GetInstance()->ReadString()->ToInt();
 
     IO.Console->GetInstance()->Print("a+b = ")->PrintLine(a+b);
     IO.Console->GetInstance()->Print("a-b = ")->PrintLine(a-b);
     IO.Console->GetInstance()->Print("a*b = ")->PrintLine(a*b);
     IO.Console->GetInstance()->Print("a/b = ")->PrintLine(a/b);
   }
 }

}</lang>

OCaml

<lang ocaml>let _ =

 let a = read_int ()
 and b = read_int () in

 Printf.printf "a + b = %d\n" (a + b);
 Printf.printf "a - b = %d\n" (a - b);
 Printf.printf "a * b = %d\n" (a * b);
 Printf.printf "a / b = %d\n" (a / b);    (* truncates towards 0 *)
 Printf.printf "a mod b = %d\n" (a mod b) (* same sign as first operand *)</lang>

Oforth

<lang Oforth>: integers(b, a) {

  "a + b = "  print a b + println
  "a - b = "  print a b - println
  "a * b = "  print a b * println
  "a / b = "  print a b / println
  "a mod b = " print a b mod println 
  "a pow b = " print a b pow println

}</lang>

Output:

>12 23 integers
a + b = 35
a - b = -11
a * b = 276
a / b = 0
a mod b = 12
a pow b = 6624737266949237011120128
ok

Openscad

<lang openscad>echo (a+b); /* Sum */ echo (a-b); /* Difference */ echo (a*b); /* Product */ echo (a/b); /* Quotient */ echo (a%b); /* Modulus */</lang>

Oz

<lang oz>declare

 StdIn = {New class $ from Open.file Open.text end init(name:stdin)}

 fun {ReadInt}
    {String.toInt {StdIn getS($)}}
 end

 A = {ReadInt}
 B = {ReadInt}

in

 {ForAll
  ["A+B = "#A+B
   "A-B = "#A-B
   "A*B = "#A*B
   "A/B = "#A div B  %% truncates towards 0
   "remainder "#A mod B  %% has the same sign as A
   "A^B = "#{Pow A B}
  ]
  System.showInfo}</lang>

PARI/GP

Integer division with \ rounds to $-\infty$ . There also exists the \/ round-to-nearest (ties to $+\infty$ ) operator. Ordinary division / does not round but returns rationals if given integers with a non-integral quotient. <lang parigp>arith(a,b)={

 print(a+b);
 print(a-b);
 print(a*b);
 print(a\b);
 print(a%b);
 print(a^b);

};</lang>

Pascal

<lang pascal>program arithmetic(input, output)

var

a, b: integer;

begin

readln(a, b);
writeln('a+b = ', a+b);
writeln('a-b = ', a-b);
writeln('a*b = ', a*b);
writeln('a/b = ', a div b, ', remainder ', a mod b);

end.</lang>

Perl

Works with: Perl version 5.x

<lang perl>my $a = <>; my $b = <>;

print

   "sum:              ", $a + $b, "\n",
   "difference:       ", $a - $b, "\n",
   "product:          ", $a * $b, "\n",
   "integer quotient: ", int($a / $b), "\n",
   "remainder:        ", $a % $b, "\n",
   "exponent:         ", $a ** $b, "\n"
   ;</lang>

Perl 6

Works with: Rakudo version #21 "Seattle"

<lang perl6>my Int $a = get.floor; my Int $b = get.floor;

say 'sum: ', $a + $b; say 'difference: ', $a - $b; say 'product: ', $a * $b; say 'integer quotient: ', $a div $b; say 'remainder: ', $a % $b; say 'exponentiation: ', $a**$b;</lang>

Note that div doesn't always do integer division; it performs the operation "most appropriate to the operand types". Synopsis 3 guarantees that div "on built-in integer types is equivalent to taking the floor of a real division". If you want integer division with other types, say floor($a/$b).

PHL

<lang phl>module arith;

extern printf; extern scanf;

@Integer main [ @Pointer<@Integer> a = alloc(4); @Pointer<@Integer> b = alloc(4); scanf("%i %i", a, b);

printf("a + b = %i\n", a::get + b::get); printf("a - b = %i\n", a::get - b::get); printf("a * b = %i\n", a::get * b::get); printf("a / b = %i\n", a::get / b::get); printf("a % b = %i\n", a::get % b::get); printf("a ** b = %i\n", a::get ** b::get);

return 0; ]</lang>

PHP

<lang php><?php $a = fgets(STDIN); $b = fgets(STDIN);

echo

   "sum:                 ", $a + $b, "\n",
   "difference:          ", $a - $b, "\n",
   "product:             ", $a * $b, "\n",
   "truncating quotient: ", (int)($a / $b), "\n",
   "flooring quotient:   ", floor($a / $b), "\n",
   "remainder:           ", $a % $b, "\n";

?></lang>

PicoLisp

<lang PicoLisp>(de math (A B)

  (prinl "Add      " (+ A B))
  (prinl "Subtract " (- A B))
  (prinl "Multiply " (* A B))
  (prinl "Divide   " (/ A B))        # Trucates towards zero
  (prinl "Div/rnd  " (*/ A B))       # Rounds to next integer
  (prinl "Modulus  " (% A B))        # Sign of the first operand
  (prinl "Power    " (** A B)) )</lang>

Piet


command   stack
in(int)   A
duplicate AA
duplicate AAA
duplicate AAAA
duplicate AAAAA
in(int)   BAAAAA
duplicate BBAAAAA
duplicate BBBAAAAA
duplicate BBBBAAAAA
duplicate BBBBBAAAAA
push 9    9BBBBBAAAAA
push 1    19BBBBBAAAAA
roll      BBBBAAAABA
push 7    7BBBBAAAABA
push 1    17BBBBAAAABA
roll      BBBAAABABA
push 5    5BBBAAABABA
push 1    15BBBAAABABA
roll      BBAABABABA
push 3    3BBAABABABA
push 1    13BBAABABABA
roll      BABABABABA
add       (A+B)BABABABA
out(int)  BABABABA
sub       (A-B)BABABA
out(int)  BABABA
mult      (A*B)BABA
out(int)  BABA
divide    (A/B)BA
out(int)  BA
mod       (A%B)
out(int)  NULL
push 1    1
exit

How rounding is handled is up to the interpreter, but I believe the intent was round towards 0.

PL/I

<lang PL/I> get list (a, b); put skip list (a+b); put skip list (a-b); put skip list (a*b); put skip list (trunc(a/b)); /* truncates towards zero. */ put skip list (mod(a, b)); /* Remainder is always positive. */ put skip list (rem(a, b)); /* Sign can be negative. */</lang>

Pop11

<lang pop11>;;; Setup token reader vars itemrep; incharitem(charin) -> itemrep;

read the numbers

lvars a = itemrep(), b = itemrep();

Print results

printf(a + b, 'a + b = %p\n'); printf(a - b, 'a - b = %p\n'); printf(a * b, 'a * b = %p\n'); printf(a div b, 'a div b = %p\n'); printf(a mod b, 'a mod b = %p\n');</lang>

PostScript

<lang ps>/arithInteger {

  /x exch def
  /y exch def
  x y add =
  x y sub =
  x y mul =
  x y idiv =
  x y mod =
  x y exp =

} def</lang>

PowerShell

<lang powershell>$a = [int] (Read-Host First Number) $b = [int] (Read-Host Second Number)

Write-Host "Sum: $($a + $b)" Write-Host "Difference: $($a - $b)" Write-Host "Product: $($a * $b)" Write-Host "Quotient: $($a / $b)" Write-Host "Quotient, round to even: $([Math]::Round($a / $b))" Write-Host "Remainder, sign follows first: $($a % $b)"</lang> Numbers are automatically converted to accomodate for the result. This means not only that Int32 will be expanded to Int64 but also that a non-integer quotient will cause the result to be of a floating-point type.

The remainder has the sign of the first operand.

No exponentiation operator exists, but can be worked around with the .NET BCL: <lang powershell>[Math]::Pow($a, $b)</lang>

ProDOS

<lang ProDOS>IGNORELINE Note: This example includes the math module. include arithmeticmodule

a

editvar /newvar /value=a /title=Enter first integer: editvar /newvar /value=b /title=Enter second integer: editvar /newvar /value=c do add -a-,-b-=-c- printline -c- do subtract a,b printline -c- do multiply a,b printline -c- do divide a,b printline -c- do modulus a,b printline -c- editvar /newvar /value=d /title=Do you want to calculate more numbers? if -d- /hasvalue yes goto :a else goto :end

end</lang>

<lang ProDOS>IGNORELINE Note: This example does not use the math module.

a

editvar /newvar /value=a /title=Enter first integer: editvar /newvar /value=b /title=Enter second integer: editvar /newvar /value=-a-+-b-=-c- printline -c- editvar /newvar /value=a*b=c printline -c- editvar /newvar /value=a/b=c printline -c- editvar /newvar /value=a %% b=c printline -c- editvar /newvar /value=d /title=Do you want to calculate more numbers? if -d- /hasvalue yes goto :a else goto :end

end</lang>

Prolog

Integer quotient (`//`) rounds towards 0.

Remainder (`rem`) matches the sign of its first operand.

print_expression_and_result(M, N, Operator) :-

   Expression =.. [Operator, M, N],
   Result is Expression,
   format('~w ~8|is ~d~n', [Expression, Result]).

arithmetic_integer :-

   read(M),
   read(N),
   maplist( print_expression_and_result(M, N), [+,-,*,//,rem,^] ).

</lang>

Use thus:

<lang prolog> ?- arithmetic_integer. |: 5. |: 7. 5+7 is 12 5-7 is -2 5*7 is 35 5//7 is 0 5 rem 7 is 5 5^7 is 78125 true. </lang>

PureBasic

<lang purebasic>OpenConsole()

Define a, b

Print("Number 1: "): a = Val(Input()) Print("Number 2: "): b = Val(Input())

PrintN("Sum: " + Str(a + b)) PrintN("Difference: " + Str(a - b)) PrintN("Product: " + Str(a * b)) PrintN("Quotient: " + Str(a / b)) ; Integer division (rounding mode=truncate) PrintN("Remainder: " + Str(a % b)) PrintN("Power: " + Str(Pow(a, b)))

Input()

CloseConsole()</lang>

Python

<lang python>x = int(raw_input("Number 1: ")) y = int(raw_input("Number 2: "))

print "Sum: %d" % (x + y) print "Difference: %d" % (x - y) print "Product: %d" % (x * y) print "Quotient: %d" % (x / y) # or x // y for newer python versions.

                                  # truncates towards negative infinity

print "Remainder: %d" % (x % y) # same sign as second operand print "Quotient: %d with Remainder: %d" % divmod(x, y) print "Power: %d" % x**y

1. Only used to keep the display up when the program ends

raw_input( )</lang>

Notes: In Python3 raw_input() will be renamed to input() (the old input() built-in will go away, though one could use eval(input()) to emulate the old ... and ill-advised ... behavior). Also a better program would wrap the attempted int() conversions in a try: ... except ValueError:... construct such as:

<lang python>def getnum(prompt):

   while True: # retrying ...
       try:
           n = int(raw_input(prompt))
       except ValueError:
           print "Input could not be parsed as an integer. Please try again."\
           continue
       break
   return n

x = getnum("Number1: ") y = getnum("Number2: ") ...</lang>

(In general it's good practice to perform parsing of all input in exception handling blocks. This is especially true of interactive user input, but also applies to data read from configuration and other files, and marshaled from other processes via any IPC mechanism).

Python also has the procedure divmod that returns both quotient and remainder. eg

quotient, remainder = divmod(355,113)

Giving a quotient of 3, and a remainder of 16.

Python 3.0 compatible code

<lang python>def arithmetic(x, y):

   for op in "+ - * // % **".split():
       expr = "%(x)s %(op)s %(y)s" % vars()
       print("%s\t=> %s" % (expr, eval(expr)))

arithmetic(12, 8) arithmetic(input("Number 1: "), input("Number 2: "))</lang> Output:

12 + 8  => 20
12 - 8  => 4
12 * 8  => 96
12 // 8 => 1
12 % 8  => 4
12 ** 8	=> 429981696
Number 1: 20
Number 2: 4
20 + 4  => 24
20 - 4  => 16
20 * 4  => 80
20 // 4 => 5
20 % 4  => 0
20 ** 4 => 160000

R

<lang R>cat("insert number ") a <- scan(nmax=1, quiet=TRUE) cat("insert number ") b <- scan(nmax=1, quiet=TRUE) print(paste('a+b=', a+b)) print(paste('a-b=', a-b)) print(paste('a*b=', a*b)) print(paste('a%/%b=', a%/%b)) print(paste('a%%b=', a%%b)) print(paste('a^b=', a^b)) </lang>

Racket

lang racket

(define (arithmetic x y)

 (for ([op '(+ - * / quotient remainder modulo max min gcd lcm)])
   (displayln (~a (list op x y) " => " 
                  ((eval op (make-base-namespace)) x y)))))

(arithmetic 8 12) </lang> Output:

(+ 8 12) => 20
(- 8 12) => -4
(* 8 12) => 96
(/ 8 12) => 2/3
(quotient 8 12) => 0
(remainder 8 12) => 8
(modulo 8 12) => 8
(max 8 12) => 12
(min 8 12) => 8
(gcd 8 12) => 4
(lcm 8 12) => 24

Raven

<lang raven>' Number 1: ' print expect 0 prefer as x ' Number 2: ' print expect 0 prefer as y

x y + " sum: %d\n" print x y - "difference: %d\n" print x y * " product: %d\n" print x y / " quotient: %d\n" print x y % " remainder: %d\n" print</lang>

REBOL

<lang rebol>REBOL [ Title: "Integer" Author: oofoe Date: 2010-09-29 URL: http://rosettacode.org/wiki/Arithmetic/Integer ]

x: to-integer ask "Please type in an integer, and press [enter]: " y: to-integer ask "Please enter another integer: " print ""

print ["Sum:" x + y] print ["Difference:" x - y] print ["Product:" x * y]

print ["Integer quotient (coercion) :" to-integer x / y] print ["Integer quotient (away from zero) :" round x / y] print ["Integer quotient (halves round towards even digits) :" round/even x / y] print ["Integer quotient (halves round towards zero) :" round/half-down x / y] print ["Integer quotient (round in negative direction) :" round/floor x / y] print ["Integer quotient (round in positive direction) :" round/ceiling x / y] print ["Integer quotient (halves round in positive direction):" round/half-ceiling x / y]

print ["Remainder:" r: x // y]

REBOL evaluates infix expressions from left to right. There are no
precedence rules -- whatever is first gets evaluated. Therefore when
performing this comparison, I put parens around the first term
("sign? a") of the expression so that the value of /a/ isn't
compared to the sign of /b/. To make up for it, notice that I don't
have to use a specific return keyword. The final value in the
function is returned automatically.

match?: func [a b][(sign? a) = sign? b]

result: copy [] if match? r x [append result "first"] if match? r y [append result "second"]

You can evaluate arbitrary expressions in the middle of a print, so
I use a "switch" to provide a more readable result based on the
length of the /results/ list.

print [ "Remainder sign matches:" switch length? result [ 0 ["neither"] 1 [result/1] 2 ["both"] ] ]

print ["Exponentiation:" x ** y]</lang>

Sample output:

Please type in an integer, and press [enter]: 17
Please enter another integer: -4

Sum: 13
Difference: 21
Product: -68
Integer quotient (coercion)                          : -4
Integer quotient (away from zero)                    : -4
Integer quotient (halves round towards even digits)  : -4
Integer quotient (halves round towards zero)         : -4
Integer quotient (round in negative direction)       : -5
Integer quotient (round in positive direction)       : -4
Integer quotient (halves round in positive direction): -4
Remainder: 1
Remainder sign matches: first
Exponentiation: 1.19730367213036E-5

Retro

Retro's arithmetic functions are based on those in Forth. The example is an adaption of the one from Forth.

<lang Retro>: arithmetic ( ab- )

 over    "\na       = %d" puts
 dup     "\nb       = %d" puts
 2over + "\na + b   = %d" puts
 2over - "\na - b   = %d" puts
 2over * "\na * b   = %d" puts
 /mod    "\na / b   = %d" puts
         "\na mod b = %d\n" puts ;</lang>

REXX

<lang rexx>/*REXX pgm gets 2 integers from the C.L. or via prompt, shows some opers*/ numeric digits 20 /*all numbers are rounded at ··· */

                                      /*··· the 20th significant digit.*/

parse arg x y . /*maybe the integers are on C.L.?*/ if y== then do /*nope, then prompt user for 'em.*/

              say "─────Enter two integer values  (separated by blanks):"
              parse pull x y .
              end
    do 2                              /*show  A with B, then  B with A.*/
    say                               /*show blank line for eyeballing.*/

    call show 'addition'      , "+",  x+y
    call show 'subtraction'   , "-",  x-y
    call show 'multiplication', "*",  x*y
    call show 'int  division' , "%",  x%y,   '   [rounds down]'
    call show 'real division' , "/",  x/y
    call show 'div remainder' , "//", x//y, '    [sign from 1st operand]'
    call show 'power'         , "**", x**y

    parse value  x y  with  y x       /*swap the two values & do again.*/
    end   /*2*/

exit /*stick a fork in it, we're done.*/ /*──────────────────────────────────SHOW subroutine─────────────────────*/ show: parse arg what,oper,value,comment say right(what,25)' ' x center(oper,4) y ' ───► ' value comment return</lang> output when using the input of: 17 -4

                 addition  17  +   -4  ───►  13
              subtraction  17  -   -4  ───►  21
           multiplication  17  *   -4  ───►  -68
            int  division  17  %   -4  ───►  -4    [rounds down]
            real division  17  /   -4  ───►  -4.25
            div remainder  17  //  -4  ───►  1     [sign from 1st operand]
                    power  17  **  -4  ───►  0.000011973036721303624238

                 addition  -4  +   17  ───►  13
              subtraction  -4  -   17  ───►  -21
           multiplication  -4  *   17  ───►  -68
            int  division  -4  %   17  ───►  0    [rounds down]
            real division  -4  /   17  ───►  -0.23529411764705882353
            div remainder  -4  //  17  ───►  -4     [sign from 1st operand]
                    power  -4  **  17  ───►  -17179869184

Ruby

<lang ruby>puts 'Enter x and y' x = gets.to_i # to check errors, use x=Integer(gets) y = gets.to_i

puts "Sum: #{x+y}",

    "Difference: #{x-y}",
    "Product: #{x*y}",
    "Quotient: #{x/y}",       # truncates towards negative infinity
    "Quotient: #{x.fdiv(y)}", # float
    "Remainder: #{x%y}",      # same sign as second operand
    "Exponentiation: #{x**y}"</lang>

Run BASIC

<lang runbasic>input "1st integer: "; i1 input "2nd integer: "; i2

print " Sum"; i1 + i2 print " Diff"; i1 - i2 print " Product"; i1 * i2 if i2 <>0 then print " Quotent "; int( i1 / i2); else print "Cannot divide by zero." print "Remainder"; i1 MOD i2 print "1st raised to power of 2nd"; i1 ^ i2</lang>

Rust

Note that this code cannot be run within the Rust playpen as it does not support console input. <lang rust>use std::io;

fn main() {

   #![allow(unstable)] // Currently required whilst Rust 1.0 is finalised
   let a: i32 = from_str(io::stdin().read_line().unwrap().trim().as_slice()).unwrap();
   let b: i32 = from_str(io::stdin().read_line().unwrap().trim().as_slice()).unwrap();

   let sum = a + b;
   println!("a + b = {0}" , sum);
   println!("a - b = {0}" , a - b);
   println!("a * b = {0}" , a * b);
   println!("quotient of a / b = {0}" , a / b); // truncates towards 0
   println!("remainder of a / b = {0}" , a % b); // same sign as first operand

}</lang>

Scala

<lang scala>val a = Console.readInt val b = Console.readInt

val sum = a + b //integer addition is discouraged in print statements due to confusion with String concatenation println("a + b = " + sum) println("a - b = " + (a - b)) println("a * b = " + (a * b)) println("quotient of a / b = " + (a / b)) // truncates towards 0 println("remainder of a / b = " + (a % b)) // same sign as first operand</lang>

Scheme

<lang scheme>(define (arithmetic x y)

 (for-each (lambda (op)
             (write  (list op x y))
             (display " => ")
             (write ((eval op) x y))
             (newline))
           '(+ - * / quotient remainder modulo max min gcd lcm)))

(arithmetic 8 12)</lang> quotient - truncates towards 0 remainder - same sign as first operand modulo - same sign as second operand

 prints this:

(+ 8 12) => 20
(- 8 12) => -4
(* 8 12) => 96
(/ 8 12) => 2/3
(quotient 8 12) => 0
(remainder 8 12) => 8
(modulo 8 12) => 8
(max 8 12) => 12
(min 8 12) => 8
(gcd 8 12) => 4
(lcm 8 12) => 24

Seed7

<lang seed7>$ include "seed7_05.s7i";

const proc: main is func

 local
   var integer: a is 0;
   var integer: b is 0;
 begin
   write("a = ");
   readln(a);
   write("b = ");
   readln(b);

   writeln("a + b = " <& a + b);
   writeln("a - b = " <& a - b);
   writeln("a * b = " <& a * b);
   writeln("a div b = " <& a div b);    # Rounds towards zero
   writeln("a rem b = " <& a rem b);    # Sign of the first operand
   writeln("a mdiv b = " <& a mdiv b);  # Rounds towards negative infinity
   writeln("a mod b = " <& a mod b);    # Sign of the second operand
 end func;</lang>

Sidef

<lang ruby>var a = Sys.scanln("First number: ").to_i; var b = Sys.scanln("Second number: ").to_i;

%w'+ - * / % ** ^ | & << >>'.each { |op|

   "#{a} #{op} #{b} = #{a.$op(b)}".say;

}</lang>

Output:

** Integer a: 100
** Integer b: 20
100 + 20 = 120
100 - 20 = 80
100 * 20 = 2000
100 / 20 = 5
100 % 20 = 0
100 ** 20 = 10000000000000000000000000000000000000000
100 ^ 20 = 112
100 | 20 = 116
100 & 20 = 4
100 << 20 = 104857600
100 >> 20 = 0

Slate

<lang slate>[| :a :b | inform: (a + b) printString. inform: (a - b) printString. inform: (a * b) printString. inform: (a / b) printString. inform: (a // b) printString. inform: (a \\ b) printString.

] applyTo: {Integer readFrom: (query: 'Enter a: '). Integer readFrom: (query: 'Enter b: ')}.</lang>

Smalltalk

Works with: GNU Smalltalk

<lang smalltalk>| a b | 'Input number a: ' display. a := (stdin nextLine) asInteger. 'Input number b: ' display. b := (stdin nextLine) asInteger. ('a+b=%1' % { a + b }) displayNl. ('a-b=%1' % { a - b }) displayNl. ('a*b=%1' % { a * b }) displayNl. ('a/b=%1' % { a // b }) displayNl. ('a%%b=%1' % { a \\ b }) displayNl.</lang>

SNOBOL4

       output = "Enter first integer:"
 	first = input

output = "Enter second integer:" second = input output = "sum = " first + second output = "diff = " first - second output = "prod = " first * second output = "quot = " (qout = first / second) output = "rem = " first - (qout * second) end</lang>

SNUSP

As a BF derivative, SNUSP only has increment and decrement as native operations. Here are routines for other basic arithmetic upon single digit numbers and results.

See also: Ethiopian Multiplication <lang SNUSP>$\

,
@
\=@@@-@-----#  atoi
>
,
@
\=@@@-@-----#
<
@     #        4 copies
\=!/?!/->>+>>+>>+>>+<<<<<<<<?\#
>  | #\?<<<<<<<<+>>+>>+>>+>>-/
@  |
\==/
\>>>>\
/>>>>/
@
\==!/===?\#    add
<   \>+<-/
@
\=@@@+@+++++#  itoa
.
<
@
\==!/===?\#    subtract
<   \>-<-/
@
\=@@@+@+++++#
.
!
/\
?-             multiply
\/ #/?<<+>+>-==\     /==-<+<+>>?\#    /==-<<+>>?\#
<   \->+>+<<!/?/#   #\?\!>>+<+<-/    #\?\!>>+<<-/
@         /==|=========|=====\   /-\    |
\======<?!/>@/<-?!\>>>@/<<<-?\=>!\?/>!/@/<#
<         \=======|==========/   /-\  |
@                 \done======>>>!\?/<=/
\=@@@+@+++++#
.
!
/\
?-  zero
\/
<              divmod
@    /-\
\?\<!\?/#!===+<<<\      /-\
| \<==@\>@\>>!/?!/=<?\>!\?/<<#
|      |  |  #\->->+</
|      \=!\=?!/->>+<<?\#
@            #\?<<+>>-/
\=@@@+@+++++#
.
<
@
\=@@@+@+++++#
.
#</lang>

Standard ML

<lang sml>val () = let

 val a = valOf (Int.fromString (valOf (TextIO.inputLine TextIO.stdIn)))
 val b = valOf (Int.fromString (valOf (TextIO.inputLine TextIO.stdIn)))

in

 print ("a + b = "   ^ Int.toString (a + b)   ^ "\n");
 print ("a - b = "   ^ Int.toString (a - b)   ^ "\n");
 print ("a * b = "   ^ Int.toString (a * b)   ^ "\n");
 print ("a div b = " ^ Int.toString (a div b) ^ "\n");         (* truncates towards negative infinity *)
 print ("a mod b = " ^ Int.toString (a mod b) ^ "\n");         (* same sign as second operand *)
 print ("a quot b = " ^ Int.toString (Int.quot (a, b)) ^ "\n");(* truncates towards 0 *)
 print ("a rem b = " ^ Int.toString (Int.rem (a, b)) ^ "\n");  (* same sign as first operand *)
 print ("~a = "      ^ Int.toString (~a)      ^ "\n")          (* unary negation, unusual notation compared to other languages *)

end</lang>

Tcl

<lang tcl>puts "Please enter two numbers:"

set x [expr {int([gets stdin])}]; # Force integer interpretation set y [expr {int([gets stdin])}]; # Force integer interpretation

puts "$x + $y = [expr {$x + $y}]" puts "$x - $y = [expr {$x - $y}]" puts "$x * $y = [expr {$x * $y}]" puts "$x / $y = [expr {$x / $y}]" puts "$x mod $y = [expr {$x % $y}]" puts "$x 'to the' $y = [expr {$x ** $y}]"</lang>

Since Tcl doesn't really know about the "type" of a variable, the "expr" command is used to declare whatever follows as an "expression". This means there is no such thing as "integer arithmetic" and hence the kludge with int([gets stdin]).

Often, these operations would be performed in a different way from what is shown here. For example, to increase the variable "x" by the value of the variable "y", one would write

Also, it's important to surround the arguments to the expr in braces, especially when any of the parts of the expression are not literal constants. Discussion of this is on The Tcler's Wiki.

TI-83 BASIC

Pauses added due to TI-83's lack of screen size. <lang ti83b> Prompt A,B Disp "SUM" Pause A+B Disp "DIFFERENCE" Pause A-B Disp "PRODUCT" Pause AB Disp "INTEGER QUOTIENT" Pause int(A/B) Disp "REMAINDER" Pause A-B*int(A/B) </lang>

TI-89 BASIC

<lang ti89b>Local a, b Prompt a, b Disp "Sum: " & string(a + b) Disp "Difference: " & string(a - b) Disp "Product: " & string(a * b) Disp "Integer quotient: " & string(intDiv(a, b)) Disp "Remainder: " & string(remain(a, b))</lang>

Toka

<lang toka>[ ( a b -- )

 2dup ." a+b = " + . cr  
 2dup ." a-b = " - . cr  
 2dup ." a*b = " * . cr  
 2dup ." a/b = " / . ." remainder " mod . cr

] is mathops</lang>

TUSCRIPT

<lang tuscript> $$ MODE TUSCRIPT a=5 b=3 c=a+b c=a-b c=a*b c=a/b c=a%b </lang> Output:

a=5
b=3
c=a+b
c            = 8
c=a-b
c            = 2
c=a*b
c            = 15
c=a/b
c            = 1
c=a%b
c            = 2

UNIX Shell

The Unix shell does not directly support arithmetic operations, so external tools, such as expr are used to perform arithmetic calculations when required:

Works with: Bourne Shell

Works with: Almquist SHell

<lang bash>#!/bin/sh read a; read b; echo "a+b = " `expr $a + $b` echo "a-b = " `expr $a - $b` echo "a*b = " `expr $a \* $b` echo "a/b = " `expr $a / $b` # truncates towards 0 echo "a mod b = " `expr $a % $b` # same sign as first operand</lang>

Notes: Using the ` (backtick operators, also available in most Bourne shells via the $(...) syntax) allows us to keep the results on their labels in the most efficient and portable way. The spaces around the operators in the expr command line arguments are required and the shell requires us to quote or escape the * character has shown, to prevent any possible "globbing" --- filename expansion of the * as a wildcard character.

With SUSv3 parameter expansions:

Works with: Bourne Again SHell version 3.2

Works with: pdksh version 5.2.14

Works with: Z SHell

<lang bash>#!/bin/sh read a; read b; echo "a+b = $((a+b))" echo "a-b = $((a-b))" echo "a*b = $((a*b))" echo "a/b = $((a/b))" # truncates towards 0 echo "a mod b = $((a%b))" # same sign as first operand</lang>

Note: spaces inside the $((...)) are optional and not required; the $((...)) can be inside or outside the double quotes, but the `...` expressions from the previous example can also be inside or outside the double quotes.

VBA

<lang vb> 'Arithmetic - Integer Sub RosettaArithmeticInt() Dim opr As Variant, a As Integer, b As Integer On Error Resume Next

a = CInt(InputBox("Enter first integer", "XLSM | Arithmetic")) b = CInt(InputBox("Enter second integer", "XLSM | Arithmetic"))

Debug.Print "a ="; a, "b="; b, vbCr For Each opr In Split("+ - * / \ mod ^", " ")

   Select Case opr
       Case "mod":     Debug.Print "a mod b", a; "mod"; b, a Mod b
       Case "\":       Debug.Print "a \ b", a; "\"; b, a \ b
       Case Else:      Debug.Print "a "; opr; " b", a; opr; b, Evaluate(a & opr & b)
   End Select

Next opr End Sub </lang>

VBScript

VBScript's variables are all Variants. What starts out as an integer may be converted to something else if the need arises.

Implementation

<lang vb>option explicit dim a, b wscript.stdout.write "A? " a = wscript.stdin.readline wscript.stdout.write "B? " b = wscript.stdin.readline

a = int( a ) b = int( b )

wscript.echo "a + b=", a + b wscript.echo "a - b=", a - b wscript.echo "a * b=", a * b wscript.echo "a / b=", a / b wscript.echo "a \ b=", a \ b wscript.echo "a mod b=", a mod b wscript.echo "a ^ b=", a ^ b</lang>

Another Implementation

Gives the same output for the same input. Inspired by Python version. <lang vb>option explicit dim a, b wscript.stdout.write "A? " a = wscript.stdin.readline wscript.stdout.write "B? " b = wscript.stdin.readline

a = int( a ) b = int( b )

dim op for each op in split("+ - * / \ mod ^", " ") wscript.echo "a",op,"b=",eval( "a " & op & " b") next</lang>

Invocation

C:\foo>arithmetic.vbs
A? 45
B? 11
a + b= 4511
a - b= 34
a * b= 495
a / b= 4.09090909090909
a \ b= 4
a mod b= 1
a ^ b= 1.5322783012207E+18

Vedit macro language

<lang vedit>#1 = Get_Num("Give number a: ")

2 = Get_Num("Give number b: ")

Message("a + b = ") Num_Type(#1 + #2) Message("a - b = ") Num_Type(#1 - #2) Message("a * b = ") Num_Type(#1 * #2) Message("a / b = ") Num_Type(#1 / #2) Message("a % b = ") Num_Type(#1 % #2)</lang>

Vim Script

<lang vim>let a = float2nr(input("Number 1: ") + 0) let b = float2nr(input("Number 2: ") + 0) echo "\nSum: " . (a + b) echo "Difference: " . (a - b) echo "Product: " . (a * b) " The result of an integer division is truncated echo "Quotient: " . (a / b) " The sign of the result of the remainder operation matches the sign of " the first operand echo "Remainder: " . (a % b)</lang>

Visual Basic .NET

<lang vbnet>Imports System.Console Module Module1

 Sub Main
   Dim a = CInt(ReadLine)
   Dim b = CInt(ReadLine)
   WriteLine("Sum " & a + b)
   WriteLine("Difference " & a - b)
   WriteLine("Product " & a - b)
   WriteLine("Quotient " & a / b)
   WriteLine("Integer Quotient " & a \ b)
   WriteLine("Remainder " & a Mod b)
   WriteLine("Exponent " & a ^ b)
 End Sub

End Module</lang>

Wart

XPL0

<lang XPL0>include c:\cxpl\codes; int A, B; [A:= IntIn(0);

B:= IntIn(0);

IntOut(0, A+B); CrLf(0); IntOut(0, A-B); CrLf(0); IntOut(0, A*B); CrLf(0); IntOut(0, A/B); CrLf(0); \truncates toward zero IntOut(0, rem(0)); CrLf(0); \remainder's sign matches first operand (A) ]</lang>

XSLT

 <xsl:param name="a">5</xsl:param>
 <xsl:param name="b">2</xsl:param>
 <fo:block>a + b = <xsl:value-of select="$a + $b"/></fo:block>
 <fo:block>a - b = <xsl:value-of select="$a - $b"/></fo:block>
 <fo:block>a * b = <xsl:value-of select="$a * $b"/></fo:block>
 <fo:block>a / b = <xsl:value-of select="round($a div $b)"/></fo:block>
 <fo:block>a mod b = <xsl:value-of select="$a mod $b"/></fo:block>
</xsl:template></lang>

Yorick

<lang yorick>x = y = 0; read, x, y; write, "x + y =", x + y; write, "x - y =", x - y; write, "x * y =", x * y; write, "x / y =", x / y; // rounds toward zero write, "x % y =", x % y; // remainder; matches sign of first operand when operands' signs differ write, "x ^ y =", x ^ y; // exponentiation</lang>

zkl

<lang zkl>x,y:=ask("Two ints: ").split(" ").apply("toInt"); println("x+y = ",x + y); println("x-y = ",x - y); println("x*y = ",x * y); println("x/y = ",x / y); // rounds toward zero println("x%y = ",x % y); // remainder; matches sign of first operand when operands' signs differ println("x.divr(y) = ",x.divr(y)); // (x/y,remainder); sign as above</lang>

@@ Line 870: / Line 870: @@
 #symbol program =
 [
-    #var(type:int) a := consoleEx readLine:(Integer new) int.
+    #var a := console readLine:(Integer new).
-    #var(type:int)b := consoleEx readLine:(Integer new) int.
+    #var b := console readLine:(Integer new).
-    consoleEx writeLine:a:" + ": b:" = ":(a + b).
+    console writeLine:a:" + ": b:" = ":(a + b).
-    consoleEx writeLine:a:" - ": b:" = ":(a - b).
+    console writeLine:a:" - ": b:" = ":(a - b).
-    consoleEx writeLine:a:" * ": b:" = ":(a * b).
+    console writeLine:a:" * ": b:" = ":(a * b).
-    consoleEx writeLine:a:" / ": b:" = ":(a / b).   // truncates towards 0
+    console writeLine:a:" / ": b:" = ":(a / b).   // truncates towards 0
-    consoleEx writeLine:a:" % ":b:" = ":(a mod:b). // matches sign of first operand
+    console writeLine:a:" % ":b:" = ":(a mod:b). // matches sign of first operand
 ].</lang>