Literals/Integer

Literals/Integer
You are encouraged to solve this task according to the task description, using any language you may know.

Some programming languages have ways of expressing integer literals in bases other than the normal base ten.

Show how integer literals can be expressed in as many bases as your language allows.

Note: this should not involve the calling of any functions/methods but should be interpreted by the compiler or interpreter as an integer written to a given base.

AWK

<lang>BEGIN {

   if ( (0x2d7 == 727) &&
        (01327 == 727) ) {
       print "true"
   }

}</lang>

C

Leading 0 means octal, 0x or 0X means hexadecimal. Otherwise, it is just decimal.

<lang c>#include <stdio.h>

int main() {

 printf("%s\n",
        ( (727 == 0x2d7) && 
          (727 == 01327)    ) ? "true" : "false");

 return 0;

}</lang>

C has no way of specifying integers in binary (if there's something like 0b..., it is not standard)

Common Lisp

(This is an interactive common lisp session)

binary: #b, octal: #o, hexadecimal: #x, any base from 2 to 36: #Nr

>(= 727 #b1011010111)
T
>(= 727 #o1327)
T
>(= 727 #x2d7)
T
>(= 727 #20r1g7)
T

Fortran

<lang fortran>program IntegerLiteral

 implicit none
 integer, parameter   :: dec = 727
 integer, parameter   :: hex = Z'2d7'
 integer, parameter   :: oct = O'1327'
 integer, parameter   :: bin = B'1011010111' 

 print *, dec, hex, oct, bin

end program IntegerLiteral</lang>

Outputs:

         727         727         727         727

Haskell

(This is an interactive ghci session)

Oct(leading 0o or 0O), Hex(leading 0x or 0X) <lang haskell> Prelude> 727 == 0o1327 True Prelude> 727 == 0x2d7 True </lang>

Java

Leading 0 means octal, 0x or 0X means hexadecimal. Otherwise, it is just decimal.

<lang java> public class IntegerLiterals {

   public static void main(String[] args) {
       System.out.println( 727 == 0x2d7 && 
                           727 == 01327    );
   }

}</lang>

Java has no way of specifying integers in binary

JavaScript

<lang javascript> if ( 727 == 0x2d7 &&

    727 == 01327 )
   window.alert("true");

</lang>

OCaml

(This is an interactive ocaml session)

Bin(leading 0b or 0B), Oct(leading 0o or 0O), Hex(leading 0x or 0X) <lang ocaml>

1. 727 = 0b1011010111;;

- : bool = true

1. 727 = 0o1327;;

- : bool = true

1. 727 = 0x2d7;;

- : bool = true </lang>

Perl

<lang perl> print "true\n" if ( 727 == 0x2d7 &&

                   727 == 01327 &&
                   727 == 0b1011010111 );

</lang>

PHP

<lang php><?php if ( 727 == 0x2d7 &&

    727 == 01327 )
   echo "true\n";

?></lang>

Python

Works with: Python version 3.0

Python 3.0 brought in the binary literal and uses 0o or 0O exclusively for octal. <lang python>>>> # Bin(leading 0b or 0B), Oct(leading 0o or 0O), Dec, Hex(leading 0x or 0X), in order: >>> 0b1011010111 == 0o1327 == 727 == 0x2d7 True >>> </lang>

Works with: Python version 2.6

Python 2.6 has the binary and new octal formats of 3.0, as well as keeping the earlier leading 0 octal format of previous 2.X versions for compatability. <lang python>>>> # Bin(leading 0b or 0B), Oct(leading 0o or 0O, or just 0), Dec, Hex(leading 0x or 0X), in order: >>> 0b1011010111 == 0o1327 == 01327 == 727 == 0x2d7 True >>> </lang>

Works with: Python version 2.5

<lang python>>>> # Oct(leading 0), Dec, Hex(leading 0x or 0X), in order: >>> 01327 == 727 == 0x2d7 True >>> </lang>

Ruby

(This is an interactive ruby session)

irb(main):001:0> 727 == 0b1011010111
=> true
irb(main):002:0> 727 == 0x2d7
=> true
irb(main):003:0> 727 == 01327
=> true

Scheme

(This is an interactive scheme session)

binary: #b, octal: #o, decimal: #d (optional obviously), hex: #x

> (= 727 #b1011010111)
#t
> (= 727 #o1327)
#t
> (= 727 #d727)
#t
> (= 727 #x2d7)
#t

UNIX Shell

Works with: bash

As manual states, 0x or 0X is the prefix for hexadecimal numbers, while 0 is the one for octal, and nothing means the number is decimal. But the sintax BASE#NUMBER can be used, with BASE going from 2 to 64, and the symbols used are digits, lowercase letters, uppercase letters, @ and _ in that order; if the BASE is less than or equal to 36, lowercase and uppercase letters can be used interchangeably to represent number from 10 and 35. (From the info manual of the Bash). This syntax works only in some circumstances, i.e. in the shell expansion (e.g. inside $(( ))) or using let.

dec=727
oct=$(( 01327 ))
bin=$(( 2#1011010111 ))
hex=$(( 0x2d7 ))
# or e.g.
let bin=2#1011010111
let "baseXX = 20#1g7"