Formatted numeric output
Express a number in decimal as a fixed-length string with leading zeros.
You are encouraged to solve this task according to the task description, using any language you may know.
- Task
For example, the number 7.125 could be expressed as 00007.125.
11l
<lang 11l>print(‘#05.3’.format(7.125))</lang>
- Output:
00007.125
8086 Assembly
The PrintString and PrintChar routines was omitted to keep this short. They handle the printing of null-terminated strings.
As an added bonus, this program supports trailing zeroes, but since the example didn't have any it won't get run. <lang asm> .model small
.stack 1024
.data
;data segment is unused in this program
.code
start:
mov ax,@code mov ds,ax mov es,ax
cld ;make lodsb, etc. auto-increment
mov al, byte ptr [ds:LeadingZeroes] mov cl,al mov ch,0 mov al,'0' ;30h jcxz DonePrintingLeadingZeroes ;there are leading zeroes so we won't skip that section. This branch is not taken.
printLeadingZeroes: call PrintChar ;print ascii 0 to the terminal 4 times loop printLeadingZeroes
DonePrintingLeadingZeroes:
mov si, offset TestString call PrintString
mov al, byte ptr [ds:TrailingZeroes] mov cl,al mov ch,0 mov al,'0' ;30h jcxz DonePrintingTrailingZeroes ;there are none in this example so this branch is always taken printTrailingZeroes: call PrintChar loop printTrailingZeroes
DonePrintingTrailingZeroes: mov ax,4C00h int 21h ;exit to DOS
TestString byte "7.125",0
LeadingZeroes byte 4 ;number of leading zeroes to print TrailingZeroes byte 0 ;number of trailing zeroes to print</lang>
- Output:
C:\>prog.exe 00007.125 C:\>_
8th
<lang forth> 7.125 "%09.3f" s:strfmt . cr </lang>
- Output:
00007.125
AArch64 Assembly
<lang AArch64 Assembly> /* ARM assembly AARCH64 Raspberry PI 3B */ /* program formatNum64.s */ /* use C library printf ha, ha, ha !!! */
/*******************************************/ /* Constantes file */ /*******************************************/ /* for this file see task include a file in language AArch64 assembly*/ .include "../includeConstantesARM64.inc" /*******************************************/ /* Initialized data */ /*******************************************/ .data szFormat1: .asciz " %09.3f\n" .align 4 sfNumber: .double 0f-7125E-3 sfNumber1: .double 0f7125E-3 /*******************************************/ /* UnInitialized data */ /*******************************************/ .bss .align 4 /*******************************************/ /* code section */ /*******************************************/ .text .global main main: // entry of program
ldr x0,qAdrszFormat1 // format ldr x1,qAdrsfNumber // float number address ldr d0,[x1] // load float number in d0 bl printf // call C function !!! ldr x0,qAdrszFormat1 ldr x1,qAdrsfNumber1 ldr d0,[x1] bl printf
100: // standard end of the program
mov x0,0 // return code mov x8,EXIT // request to exit program svc 0 // perform the system call
qAdrszFormat1: .quad szFormat1 qAdrsfNumber: .quad sfNumber qAdrsfNumber1: .quad sfNumber1
</lang>
- Output:
-0007.125 00007.125
Ada
<lang ada>with Ada.Text_Io.Editing; use Ada.Text_Io.Editing; with Ada.Text_Io; use Ada.Text_Io;
procedure Zero_Fill is
Pic_String: String := "<999999.99>"; Pic : Picture := To_Picture(Pic_String); type Money is delta 0.01 digits 8; package Money_Output is new Decimal_Output(Money); use Money_Output; Value : Money := 37.25;
begin
Put(Item => Value, Pic => Pic);
end Zero_Fill;</lang>
- Output:
000037.25
Aime
<lang aime>o_form("/w9s0/\n", 7.125); o_form("/w12d6p6/\n", -12.0625); o_form("/w12d6p6/\n", 7.125);</lang>
- Output:
00007.125
-12.0625
7.125
ALGOL 68
<lang algol68>main:(
REAL r=exp(pi)-pi; print((r,newline)); printf(($g(-16,4)l$,-r)); printf(($g(-16,4)l$,r)); printf(($g( 16,4)l$,r)); printf(($g( 16,4,1)l$,r)); printf(($-dddd.ddddl$,-r)); printf(($-dddd.ddddl$,r)); printf(($+dddd.ddddl$,r)); printf(($ddddd.ddddl$,r)); printf(($zzzzd.ddddl$,r)); printf(($zzzz-d.ddddl$,r)); printf(($zzzz-d.ddddedl$,r)); printf(($zzzz-d.ddddeddl$,r)); printf(($4z-d.4de4dl$,r))
)</lang>
- Output:
+1.99990999791895e +1
-19.9991
19.9991
+19.9991
+19999099.979e-6
-0019.9991
0019.9991
+0019.9991
00019.9991
00019.9991
19.9991
1.9999e1
1.9999e01
1.9999e0001
AmigaE
The function RealF can be used to convert a floating point value into a string, with a specified number of decimal digits. But to fit the string into a greater container prepending 0 we must write our own function. (The one here proposed has no a flag for the alignment of the result inside the containing string) <lang amigae>PROC newRealF(es, fl, digit, len=0, zeros=TRUE)
DEF s, t, i IF (len = 0) OR (len < (digit+3)) RETURN RealF(es, fl, digit) ELSE s := String(len) t := RealF(es, fl, digit) FOR i := 0 TO len-EstrLen(t)-1 DO StrAdd(s, IF zeros THEN '0' ELSE ' ') StrAdd(s, t) StrCopy(es, s) DisposeLink(s) DisposeLink(t) ENDIF
ENDPROC es
PROC main()
DEF s[100] : STRING
WriteF('\s\n', newRealF(s, 7.125, 3,9))
ENDPROC</lang>
APL
<lang apl> 'ZF15.9' ⎕FMT 7.125 00007.125000000</lang>
APL's ⎕FMT is similar to C's printf (only it operates on arrays).
ARM Assembly
<lang ARM Assembly> /* ARM assembly Raspberry PI */ /* program formatNum.s */ /* use C library printf ha, ha, ha !!! */ /* Constantes */ .equ EXIT, 1 @ Linux syscall /* Initialized data */ .data szFormat1: .asciz " %09.3f\n" .align 4 sfNumber: .double 0f-7125E-3 sfNumber1: .double 0f7125E-3
/* UnInitialized data */ .bss .align 4
/* code section */ .text .global main main: @ entry of program
push {fp,lr} @ saves registers
ldr r0,iAdrszFormat1 @ format ldr r1,iAdrsfNumber @ number address ldr r2,[r1] @ load first 4 bytes ldr r3,[r1,#4] @ load last 4 bytes bl printf @ call C function !!! ldr r0,iAdrszFormat1 ldr r1,iAdrsfNumber1 ldr r2,[r1] ldr r3,[r1,#4] bl printf
100: @ standard end of the program
mov r0, #0 @ return code
pop {fp,lr} @restaur registers
mov r7, #EXIT @ request to exit program
swi 0 @ perform the system call
iAdrszFormat1: .int szFormat1 iAdrsfNumber: .int sfNumber iAdrsfNumber1: .int sfNumber1
</lang>
Arturo
<lang rebol>r: 7.125
print r print to :string .format: "09.3f" r</lang>
- Output:
7.125 00007.125
AutoHotkey
contributed by Laszlo on the ahk forum <lang AutoHotkey>MsgBox % pad(7.25,7) ; 0007.25 MsgBox % pad(-7.25,7) ; -007.25
pad(x,len) { ; pad with 0's from left to len chars
IfLess x,0, Return "-" pad(SubStr(x,2),len-1)
VarSetCapacity(p,len,Asc("0"))
Return SubStr(p x,1-len)
}</lang>
AWK
<lang awk>BEGIN {
r=7.125 printf " %9.3f\n",-r printf " %9.3f\n",r printf " %-9.3f\n",r printf " %09.3f\n",-r printf " %09.3f\n",r printf " %-09.3f\n",r
}</lang>
Same output as the C code.
BaCon
BaCon can use C style printf format specifiers.
<lang freebasic>' Formatted numeric output n = 7.125 PRINT n FORMAT "%09.3f\n"</lang>
- Output:
prompt$ ./formatted 00007.125
BBC BASIC
<lang bbcbasic> PRINT FNformat(PI, 9, 3)
PRINT FNformat(-PI, 9, 3)
END
DEF FNformat(n, sl%, dp%)
LOCAL @%
@% = &1020000 OR dp% << 8
IF n >= 0 THEN
= RIGHT$(STRING$(sl%,"0") + STR$(n), sl%)
ENDIF
= "-" + RIGHT$(STRING$(sl%,"0") + STR$(-n), sl%-1)</lang>
- Output:
00003.142 -0003.142
bc
First define a custom function for numeric output.
<lang bc>/*
* Print number n, using at least c characters. * * Different from normal, this function: * 1. Uses the current ibase (not the obase) to print the number. * 2. Prunes "0" digits from the right, so p(1.500, 1) prints "1.5". * 3. Pads "0" digits to the left, so p(-1.5, 6) prints "-001.5". * 4. Never prints a newline. * * Use an assignment, as t = p(1.5, 1), to discard the return value * from this function so that bc not prints the return value. */
define p(n, c) { auto d, d[], f, f[], i, m, r, s, v s = scale /* Save original scale. */
if (n < 0) { "-" /* Print negative sign. */ c -= 1 n = -n /* Remove negative sign from n. */ }
/* d[] takes digits before the radix point. */ scale = 0 for (m = n / 1; m != 0; m /= 10) d[d++] = m % 10
/* f[] takes digits after the radix point. */ r = n - (n / 1) /* r is these digits. */ scale = scale(n) f = -1 /* f counts the digits of r. */ for (m = r + 1; m != 0; m /= 10) f += 1 scale = 0 r = r * (10 ^ f) / 1 /* Remove radix point from r. */ if (r != 0) { while (r % 10 == 0) { /* Prune digits. */ f -= 1 r /= 10 } for (i = 0; i < f; i++) { f[i] = r % 10 r /= 10 } }
/* Pad "0" digits to reach c characters. */ c -= d if (f > 0) c -= 1 + f for (1; c > 0; c--) "0" /* Print "0". */
/* i = index, m = maximum index, r = digit to print. */ m = d + f for (i = 1; i <= m; i++) { if (i <= d) r = d[d - i] if (i > d) r = f[m - i] if (i == d + 1) "." /* Print radix point. */
v = 0 if (r == v++) "0" /* Print digit. */ if (r == v++) "1" if (r == v++) "2" /* r == 2 might not work, */ if (r == v++) "3" /* unless ibase is ten. */ if (r == v++) "4" if (r == v++) "5" if (r == v++) "6" if (r == v++) "7" if (r == v++) "8" if (r == v++) "9" if (r == v++) "A" if (r == v++) "B" if (r == v++) "C" if (r == v++) "D" if (r == v++) "E" if (r == v++) "F" }
scale = s /* Restore original scale. */ }</lang>
Then use this function to print 7.125 with 9 characters.
<lang bc>x = 7.125 "Decimal: "; t = p(x, 9); " " ibase = 16 "Hexadecimal: "; t = p(x, 9); " " ibase = 2 "Binary: "; t = p(x, 1001); " " quit</lang>
- Output:
Decimal: 00007.125 Hexadecimal: 0000007.2 Binary: 00111.001
Beads
<lang Beads>beads 1 program 'Formatted numeric output' calc main_init var num = 7.125 log to_str(num, min:9, zero_pad:Y)</lang>
- Output:
00007.125
C
<lang c>#include <stdio.h> main(){
float r=7.125;
printf(" %9.3f\n",-r);
printf(" %9.3f\n",r);
printf(" %-9.3f\n",r);
printf(" %09.3f\n",-r);
printf(" %09.3f\n",r);
printf(" %-09.3f\n",r);
return 0;
}</lang>
- Output:
-7.125
7.125
7.125
-0007.125
00007.125
7.125
C#
<lang csharp> class Program
{
static void Main(string[] args)
{
float myNumbers = 7.125F;
string strnumber = Convert.ToString(myNumbers);
Console.WriteLine(strnumber.PadLeft(9, '0'));
Console.ReadLine();
}
}
</lang>
C++
<lang cpp>#include <iostream>
- include <iomanip>
int main() {
std::cout << std::setfill('0') << std::setw(9) << std::fixed << std::setprecision(3) << 7.125 << std::endl;
return 0;
}</lang>
Clojure
Using cl format strings
<lang lisp>(cl-format true "~9,3,,,'0F" 7.125)</lang>
Using java format strings
<lang lisp>(printf "%09.3f" 7.125) ; format works the same way (without side the effect of printing)</lang>
COBOL
This is actually the easiest kind of numeric output to achieve in COBOL, because it requires no adjustments from the way numbers are stored internally (in fixed-point decimal). Each variable declaration requires a PIC or PICTURE clause describing the kind of data that will be stored there. In this case, we have 9 (a decimal digit), repeated five times; then V, the decimal point (cf. French virgule); and then three more decimal digits. Other terms that can appear in PICTURE clauses include A (a letter of the alphabet), X (a character), and Z (a decimal digit to be printed with leading spaces instead of leading zeros). <lang cobol>IDENTIFICATION DIVISION. PROGRAM-ID. NUMERIC-OUTPUT-PROGRAM. DATA DIVISION. WORKING-STORAGE SECTION. 01 WS-EXAMPLE.
05 X PIC 9(5)V9(3).
PROCEDURE DIVISION.
MOVE 7.125 TO X. DISPLAY X UPON CONSOLE. STOP RUN.</lang>
- Output:
00007.125
Common Lisp
<lang lisp>(format t "~9,3,,,'0F" 7.125)</lang>
D
<lang d>import std.stdio;
void main() {
immutable r = 7.125;
writefln(" %9.3f", -r);
writefln(" %9.3f", r);
writefln(" %-9.3f", r);
writefln(" %09.3f", -r);
writefln(" %09.3f", r);
writefln(" %-09.3f", r);
}</lang>
- Output:
-7.125
7.125
7.125
-0007.125
00007.125
7.125
DBL
<lang DBL>D5=7125 A10=D5,'-ZZZZX.XXX' ; 7.125 A10=D5,'-ZZZZX.XXX' [LEFT] ;7.125 A10=D5,'-XXXXX.XXX' ; 00007.125 A10=-D5,'-ZZZZX.XXX' ;- 7.125 A10=-D5,'-ZZZZX.XXX' [LEFT] ;- 7.125 A10=-D5,'-XXXXX.XXX' [LEFT] ;-00007.125 A10=-D5,'XXXXX.XXX-' ;00007.125- A10=-D5,'ZZZZX.XXX-' ; 7.125- A10=-D5,'ZZZZX.XXX-' [LEFT] ;7.125-
A10=1500055,'ZZZ,ZZX.XX ; 15,000.55</lang>
dc
First define a custom function for numeric output.
<lang dc>[*
* (n) (c) lpx * Print number n, using at least c characters. * * Different from normal, this function: * 1. Uses the current ibase (not the obase) to print the number. * 2. Prunes "0" digits from the right, so [1.500 1 lxp] prints "1.5". * 3. Pads "0" digits to the left, so [_1.5 6 lxp] prints "-001.5". * 4. Never prints a newline. *]sz
[
Sc Sn [Local n, c = from stack.]sz K Ss [Local s = original scale.]sz [Reserve local variables D, F, I, L.]sz 0 SD 0 SF 0 SI 0 SL
[ [If n < 0:]sz [-]P [Print negative sign.]sz lc 1 - sc [Decrement c.]sz 0 ln - sn [Negate n.]sz ]sI 0 ln <I
[* * Array D[] takes digits before the radix point. *]sz 0 k [scale = 0]sz 0 Sd [Local d = 0]sz ln 1 / [Push digits before radix point.]sz [ [Loop to fill D[]:]sz d 10 % ld :D [D[d] = next digit.]sz ld 1 + sd [Increment d.]sz 10 / [Remove digit.]sz d 0 !=L [Loop until no digits.]sz ]sL d 0 !=L sz [Pop digits.]sz
[* * Array F[] takes digits after the radix point. *]sz ln ln 1 / - [Push digits after radix point.]sz d X k [scale = enough.]sz _1 Sf [Local f = -1]sz d 1 + [Push 1 + digits after radix point.]sz [ [Loop to count digits:]sz lf 1 + sf [Increment f.]sz 10 / [Remove digit.]sz d 0 !=L [Loop until no digits.]sz ]sL d 0 !=L sz [Pop 1 + digits.]sz 0 k [scale = 0]sz 10 lf ^ * 1 / [Remove radix point from digits.]sz [ [Loop to prune digits:]sz lf 1 - sf [Decrement f.]sz 10 / [Remove digit.]sz d 10 % 0 =L [Loop while last digit is 0.]sz ]sL d 10 % 0 =L 0 Si [Local i = 0]sz [ [Loop to fill F[]:]sz d 10 % li :F [F[i] = next digit.]sz 10 / [Remove digit.]sz li 1 + si [Increment i.]sz lf li <L [Loop while i < f.]sz ]sL lf li <L sz [Pop digits.]sz
lc ld - [Push count = c - d.]sz [ [If f > 0:]sz 1 lf + - [Subtract 1 radix point + f from count.]sz ]sI 0 lf >I [ [Loop:]sz [0]P [Print a padding "0".]sz 1 - [Decrement count.]sz d 0 <L [Loop while count > 0.]sz ]sL d 0 <L sz [Pop count.]sz
[ [Local function (digit) lPx:]sz [ [Execute:]sz [* * Push the string that matches the digit. *]sz [[0] 2Q]sI d 0 =I [[1] 2Q]sI d 1 =I [[2] 2Q]sI d 2 =I [[3] 2Q]sI d 3 =I [[4] 2Q]sI d 4 =I [[5] 2Q]sI d 5 =I [[6] 2Q]sI d 6 =I [[7] 2Q]sI d 7 =I [[8] 2Q]sI d 8 =I [[9] 2Q]sI d 9 =I [[A] 2Q]sI d A =I [[B] 2Q]sI d B =I [[C] 2Q]sI d C =I [[D] 2Q]sI d D =I [[E] 2Q]sI d E =I [[F] 2Q]sI d F =I [?] [Else push "?".]sz ]x P [Print the string.]sz sz [Pop the digit.]sz ]SP ld [Push counter = d.]sz [ [Loop:]sz 1 - [Decrement counter.]sz d ;D lPx [Print digit D[counter].]sz d 0 <L [Loop while counter > 0.]sz ]sL d 0 <L sz [Pop counter.]sz [ [If f > 0:]sz [.]P [Print radix point.]sz lf [Push counter = f.]sz [ [Loop:]sz 1 - [Decrement counter.]sz d ;F lPx [Print digit F[counter].]sz d 0 <L [Loop while counter > 0.]sz ]sL d 0 <L sz [Pop counter.]sz ]sI 0 lf >I
[Restore variables n, c, d, f, D, F, L, I, P.]sz Lnsz Lcsz Ldsz Lfsz LDsz LFsz LLsz LIsz LPsz Ls k [Restore variable s. Restore original scale.]sz
]sp</lang>
Then use this function to print 7.125 with 9 characters:
<lang dc>7.125 sx [Decimal: ]P lx 9 lpx [ ]P 16 i [Hexadecimal: ]P lx 9 lpx [ ]P 2 i [Binary: ]P lx 9 lpx [ ]P</lang>
- Output:
Decimal: 00007.125 Hexadecimal: 0000007.2 Binary: 00111.001
Delphi
<lang Delphi> program FormattedNumericOutput;
{$APPTYPE CONSOLE}
uses
SysUtils;
const
fVal = 7.125;
begin
Writeln(FormatFloat('0000#.000',fVal));
Writeln(FormatFloat('0000#.0000000',fVal));
Writeln(FormatFloat('##.0000000',fVal));
Writeln(FormatFloat('0',fVal));
Writeln(FormatFloat('#.#E-0',fVal));
Writeln(FormatFloat('#,##0.00;;Zero',fVal));
Readln;
end. </lang>
- Output:
00007.125 00007.1250000 7.1250000 7 7.1E0 7.13
Eiffel
<lang Eiffel> note description : "{ 2 Examples are given. The first example uses the standard library's FORMAT_DOUBLE class. The second example uses the AEL_PRINTF class from the freely available Amalasoft Eiffel Library (AEL).
See additional comments in the code. }"
class APPLICATION
inherit AEL_PRINTF -- Optional, see below
create make
feature {NONE} -- Initialization
make -- Run application. do print_formatted_std (7.125) print_formatted_ael (7.125) end
--|--------------------------------------------------------------
print_formatted_std (v: REAL_64) -- Print the value 'v' as a zero-padded string in a fixed -- overall width of 9 places and, with a precision of -- to 3 places to the right of the decimal point. -- Use the FORMAT_DOUBLE class from the standard library local fmt: FORMAT_DOUBLE do create fmt.make (9, 3) fmt.zero_fill print (fmt.formatted (v) + "%N") end
--|--------------------------------------------------------------
print_formatted_ael (v: REAL_64) -- Print the value 'v' as a zero-padded string in a fixed -- overall width of 9 places and, with a precision of -- to 3 places to the right of the decimal point. -- Use the AEL_PRINTF class from the Amalasoft Eiffel Library -- freely available from www.amalasoft.com do -- printf accepts a format string and an argument list -- The argument list is a container (often a manifest -- array) of values corresponding to the type of the format -- specified in the format string argument. -- When only one argument is needed, then there is also the -- option to use just the value, without the container. -- In this example, the line would be: -- printf ("%%09.3f%N", v) -- The more deliberate form is used in the actual example, -- as it is more representative of common usage, when there -- are multiple value arguments.
printf ("%%09.3f%N", << v >>) end
end </lang>
Elixir
<lang elixir>n = 7.125
- io.fwrite "~f~n", [n]
- io.fwrite "~.3f~n", [n]
- io.fwrite "~9f~n", [n]
- io.fwrite "~9.3f~n", [n]
- io.fwrite "~9..0f~n", [n]
- io.fwrite "~9.3.0f~n", [n]
- io.fwrite "~9.3._f~n", [n]
- io.fwrite "~f~n", [-n]
- io.fwrite "~9.3f~n", [-n]
- io.fwrite "~9.3.0f~n", [-n]
- io.fwrite "~e~n", [n]
- io.fwrite "~12.4e~n", [n]
- io.fwrite "~12.4.0e~n", [n]</lang>
- Output:
7.125000
7.125
7.125000
7.125
07.125000
00007.125
____7.125
-7.125000
-7.125
000-7.125
7.12500e+0
7.125e+0
00007.125e+0
Emacs Lisp
<lang Lisp>(format "%09.3f" 7.125) ;=> "00007.125"</lang>
format is similar to C sprintf. See GNU Elisp manual on Formatting Strings.
Erlang
Built in
- Output:
14> io:fwrite("~9.3.0f~n", [7.125]).
00007.125
ERRE
<lang ERRE>PROGRAM FORMATTED
PROCEDURE FORMATTED_PRINT(N,LENGTH,DEC_PLACES->FP$)
LOCAL I,C$,NN$
FORMAT$=STRING$(LENGTH,"#")+"."
FOR I=1 TO DEC_PLACES DO
FORMAT$=FORMAT$+"#"
END FOR
OPEN("O",1,"FORMAT.$$$")
WRITE(#1,FORMAT$;N)
CLOSE(1)
OPEN("I",1,"FORMAT.$$$")
INPUT(LINE,#1,N$)
CLOSE(1)
! add leading zeros
FOR I=1 TO LEN(N$) DO
C$=MID$(N$,I,1)
IF C$=" " OR C$="%" THEN NN$=NN$+"0" ELSE NN$=NN$+C$
END FOR
FP$=RIGHT$("000000000000"+NN$,LENGTH) ! chop to required length
END PROCEDURE
BEGIN
PRINT(CHR$(12);) ! CLS
FOR I=1 TO 10 DO
N=RND(1)*10^(INT(10*RND(1))-2)
FORMATTED_PRINT(N,16,5->FP$)
PRINT("Raw number =";N;TAB(30);"Using custom function =";FP$)
END FOR
END PROGRAM</lang>
- Output:
Raw number = 1213.501 Using custom function =0000001213.50100 Raw number = 86886.11 Using custom function =0000086886.11000 Raw number = 7.98853E-03 Using custom function =0000000000.00799 Raw number = 49.03128 Using custom function =0000000049.03128 Raw number = 1072496 Using custom function =0001072496.00000 Raw number = 703.8703 Using custom function =0000000703.87030 Raw number = 9.711614 Using custom function =0000000009.71161 Raw number = 9561278 Using custom function =0009561278.00000 Raw number = 534.9367 Using custom function =0000000534.93670 Raw number = 67121.88 Using custom function =0000067121.88000
Euphoria
<lang euphoria>constant r = 7.125 printf(1,"%9.3f\n",-r) printf(1,"%9.3f\n",r) printf(1,"%-9.3f\n",r) printf(1,"%09.3f\n",-r) printf(1,"%09.3f\n",r) printf(1,"%-09.3f\n",r)</lang>
- Output:
-7.125
7.125
7.125
-0007.125
00007.125
7.125
F#
<lang fsharp>printfn "%09.3f" 7.125f</lang>
Factor
<lang factor>USE: formatting 7.125 "%09.3f\n" printf</lang>
- Output:
00007.125
Fantom
<lang fantom> class Main {
public static Void main()
{
echo (7.125.toStr.padl(9, '0'))
}
} </lang>
Forth
Forth has a rather rich set of number formatting words, which makes formatted output very flexible but sometime cumbersome.
Here one way to generate the required output. Note that the number generated is NOT truncated to the field width. If you wish to truncate the number, remove #s and 1- from the definition. (The 1- is necessary because #s always generates at least one digit, even if it's zero.)
<lang forth>\ format 'n' digits of the double word 'd'
- #n ( d n -- d ) 0 ?do # loop ;
\ ud.0 prints an unsigned double
- ud.0 ( d n -- ) <# 1- #n #s #> type ;
\ d.0 prints a signed double
- d.0 ( d n -- ) >r tuck dabs <# r> 1- #n #s rot sign #> type ;</lang>
Usage example:
<lang forth>Type: 123 s>d 8 ud.0 Result: 00000123 ok Type: -123 s>d 8 d.0 Result: -00000123 ok</lang>
Detail
Forth's number formatting words are different than many other languages because they are active code rather than using a pattern string. This small set of seven routines ( >DIGIT <# #> # #S HOLD SIGN ) allow arbitrary number formatting of double precision and single precision numbers. The number is created in a "hold' buffer the output is typically a Forth style stack-string consisting of an address and a length.
Typical of Forth the using the formatting routines means putting things in reverse order. We are also free to create a mnemonic name that gives a reminder at how numbers will appear.
To replicate the example for this task we could write:
: '.' [CHAR] . HOLD ; \ HOLD inserts a character into the number string \ right side . left side : 0000#.### ( d -- addr len) DABS <# # # # '.' # # # # # #> ;
At the console we can input a double number, execute the format routine and type the resulting string.
7.125 0000#.### TYPE 000007.125 ok
Fortran
Using standard data edit descriptors it is only possible to precede Integer data with leading zeros. <lang fortran>INTEGER :: number = 7125 WRITE(*,"(I8.8)") number ! Prints 00007125</lang>
On the other hand
One can engage in trickery via FORMAT statements, in particular the T format option. Unlike actual tab settings which on a typewriter go to a particular column following, Tn means go to column n. <lang Fortran>
INTEGER IV
REAL V
DATA V/7.125/ !A positive number.
IV = V !Grab the integer part.
WRITE (6,1) V,IV
1 FORMAT (F9.3,T1,I5.5)
END
</lang> Output is
00007.125
This would need adjustment for other sizes, but works as follows: The value part is printed (in the format system's working area) as "bbbb7.125" (b's standing for spaces), then the T1 moves the finger back to column one, and the I5.5 writes out "00007", the .5 addendum to I5 meaning print leading zeroes rather than leading spaces. It does not overwrite the subsequent ".125", and as no further output items appear the deed is done. Only later Fortran offers the addendum feature, but the Tab feature is much older.
Another approach would be to write forth a literal "0000" instead of the integer, but this is less flexible. In the absence of the .5 addendum, write the output to a character string (or equivalent), replace leading spaces by zeroes (watching out for negative numbers), and print the result.
Free Pascal
See Pascal
FreeBASIC
<lang freebasic>' FB 1.05.0 Win64
- Include "vbcompat.bi"
Dim s As String = Format(7.125, "00000.0##") Print s Sleep</lang>
- Output:
00007.125
FutureBasic
<lang futurebasic>window 1, @"Formatted Numeric Output", (0,0,480,270)
print using "0000#.###";7.125
HandleEvents</lang> Output:
00007.125
Fōrmulæ
Fōrmulæ programs are not textual, visualization/edition of programs is done showing/manipulating structures but not text. Moreover, there can be multiple visual representations of the same program. Even though it is possible to have textual representation —i.e. XML, JSON— they are intended for storage and transfer purposes more than visualization and edition.
Programs in Fōrmulæ are created/edited online in its website, However they run on execution servers. By default remote servers are used, but they are limited in memory and processing power, since they are intended for demonstration and casual use. A local server can be downloaded and installed, it has no limitations (it runs in your own computer). Because of that, example programs can be fully visualized and edited, but some of them will not run if they require a moderate or heavy computation/memory resources, and no local server is being used.
In this page you can see the program(s) related to this task and their results.
Gambas
Click this link to run this code <lang gambas>Public Sub Main()
Print Format("7.125", "00000.000")
End</lang> Output:
00007.125
gnuplot
<lang gnuplot>print sprintf("%09.3f", 7.125)</lang>
Go
<lang go>fmt.Printf("%09.3f", 7.125)</lang>
Groovy
Solution: <lang groovy>printf ("%09.3f", 7.125)</lang>
- Output:
00007.125
Haskell
<lang haskell>import Text.Printf main =
printf "%09.3f" 7.125</lang>
hexiscript
<lang hexiscript>fun format n length
let n tostr n while len n < length let n 0 + n endwhile println n
endfun
format 7.125 9</lang>
HicEst
<lang hicest>WRITE(ClipBoard, Format='i5.5, F4.3') INT(7.125), MOD(7.125, 1) ! 00007.125 </lang>
i
<lang i> concept FixedLengthFormat(value, length) { string = text(abs(value)) prefix = "" sign = ""
if value < 0 sign = "-" end
if #string < length prefix = "0"*(length-#sign-#string-#prefix) end
return sign+prefix+string }
software { d = 7.125 print(FixedLengthFormat(d, 9)) print(FixedLengthFormat(-d, 9)) } </lang>
Icon and Unicon
<lang Icon>link printf
procedure main()
every r := &pi | -r | 100-r do {
write(r," <=== no printf")
every p := "|%r|" | "|%9.3r|" | "|%-9.3r|" | "|%0.3r|" | "|%e|" | "|%d|" do
write(sprintf(p,r)," <=== sprintf ",p)
} end</lang>
- Output:
Abbreviated
3.141592653589793 <=== no printf |3.141593| <=== sprintf |%r| | 3.142| <=== sprintf |%9.3r| |3.142 | <=== sprintf |%-9.3r| |3.142| <=== sprintf |%0.3r| | 3.141593e0| <=== sprintf |%e| |3| <=== sprintf |%d|
provides printf
IDL
<lang idl>n = 7.125 print, n, format='(f08.3)'
- ==> 0007.125</lang>
IS-BASIC
<lang IS-BASIC>100 LET F=7.125 110 PRINT USING "-%%%%%.###":F</lang>
J
<lang j> 'r<0>9.3' (8!:2) 7.125 00007.125</lang>
Java
Stealing printf from C/C++: <lang java5>public class Printing{ public static void main(String[] args){ double value = 7.125; System.out.printf("%09.3f",value); // System.out.format works the same way System.out.println(String.format("%09.3f",value)); } }</lang>
- Output:
000000007.125 000000007.125
Using NumberFormat:
<lang java5>import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Format { public static void main(String[] args){ NumberFormat numForm = new DecimalFormat(); numForm.setMinimumIntegerDigits(9); //Maximum also available for Integer digits and Fraction digits numForm.setGroupingUsed(false);//stops it from inserting commas System.out.println(numForm.format(7.125));
//example of Fraction digit options numForm.setMinimumIntegerDigits(5); numForm.setMinimumFractionDigits(5); System.out.println(numForm.format(7.125)); numForm.setMinimumFractionDigits(0); numForm.setMaximumFractionDigits(2); System.out.println(numForm.format(7.125)); System.out.println(numForm.format(7.135));//rounds to even } }</lang>
- Output:
000000007.125 00007.12500 00007.12 00007.14
JavaScript
<lang javascript>var n = 123; var str = ("00000" + n).slice(-5); alert(str);</lang>
or, put in browser URL: javascript:n=123;alert(("00000"+n).slice(-5));
Also, a 60-line implementation of sprintf can be found here.
jq
The jq function pp0/1 as defined below is written in accordance with the task requirements, but no truncation occurs; pp/1 is similar but is likely to be more useful as the decimal point is aligned if possible. <lang jq>def pp0(width):
tostring | if width > length then (width - length) * "0" + . else . end;
- pp(left; right) formats a decimal number to occupy
- (left+right+1) positions if possible,
- where "left" is the number of characters to the left of
- the decimal point, and similarly for "right".
def pp(left; right):
def lpad: if (left > length) then ((left - length) * "0") + . else . end;
tostring as $s
| $s
| index(".") as $ix
| ((if $ix then $s[0:$ix] else $s end) | lpad) + "." +
(if $ix then $s[$ix+1:] | .[0:right] else "" end);</lang>
Examples: <lang jq>(1.0, 12.3, 333.333, 1e6) | pp0(10)</lang> produces <lang sh>0000000001 00000012.3 000333.333 0001000000</lang>
<lang jq>(1.0, 12.3, 333.333, 1e6) | pp(4;2)</lang> produces <lang sh>0001. 0012.3 0333.33 1000000.</lang>
Julia
Julia's @sprintf macro provides string formatting that is similar to that of the c function of the same name. Though easy to use and efficient, @sprintf has limited flexibility, as its format specification must be a string literal, precluding its use in dynamic formatting. Greater flexibility is available via the Formatting package, which provides an implementation of Python's format specification mini-language. This solution demonstrates both of these techniques to provide the leading zero padded floating point format suggested in the task description ("%09.3f"). <lang Julia>using Printf test = [7.125, [rand()*10^rand(0:4) for i in 1:9]]
println("Formatting some numbers with the @sprintf macro (using \"%09.3f\"):") for i in test
println(@sprintf " %09.3f" i)
end
using Formatting println() println("The same thing using the Formatting package:") fe = FormatExpr(" {1:09.3f}") for i in test
printfmtln(fe, i)
end </lang>
- Output:
Formatting some numbers with the @sprintf macro (using "%09.3f"):
00007.125
00001.734
00903.432
00000.980
00002.271
00559.864
00105.497
00069.955
00046.107
04970.430
The same thing using the Formatting package:
00007.125
00001.734
00903.432
00000.980
00002.271
00559.864
00105.497
00069.955
00046.107
04970.430
Kotlin
<lang scala>// version 1.0.5-2
fun main(args: Array<String>) {
val num = 7.125
println("%09.3f".format(num))
}</lang>
- Output:
00007.125
Lambdatalk
Lambdatalk has no primitive for numeric output. This is a way to define it: <lang scheme> {def fmt
{def padd {lambda {:n :x} {if {< :n 1} then else :x{padd {- :n 1} :x}}}}
{def trunc {lambda {:n} {if {> :n 0} then {floor :n} else {ceil :n}}}}
{lambda {:a :b :n}
{let { {:a :a} {:b :b} {:n {abs :n}} {:sign {if {>= :n 0} then + else -}}
{:int {trunc :n}}
{:dec {ceil {* 1.0e:b {abs {- :n {trunc :n}}}}} }
} {br}{padd {- :a {W.length {trunc :n}}} >}
{if {W.equal? :sign -} then else :sign}:int.:dec{padd {- :b {W.length :dec}} 0} }}}
-> fmt
{def numbers
7.125
10.7
0.980
-1000
559.8
-69.99
4970.430}
-> numbers
{S.map {fmt 10 3} {numbers}} -> >>>>>>>>> +7.125 >>>>>>>> +10.699 >>>>>>>>> +0.980 >>>>>> -1000.000 >>>>>>> +559.799 >>>>>>>> -69.990 >>>>>> +4970.430 </lang>
Lasso
<lang Lasso>7.125 -> asstring(-precision = 3, -padding = 9, -padchar = '0')</lang>
- Output:
00007.125
Liberty BASIC
Custom function builds on the supplied 'print using( "###.###", n)'.
NB no check that this does not truncate high-order digits...
and remember LB calculates with more figures than its normal 'print' displays.
<lang lb>
for i =1 to 10
n =rnd( 1) *10^( int( 10 *rnd(1)) -2) print "Raw number ="; n; "Using custom function ="; FormattedPrint$( n, 16, 5)
next i end
function FormattedPrint$( n, length, decPlaces)
format$ ="#."
for i =1 to decPlaces
format$ =format$ +"#"
next i
n$ =using( format$, n) ' remove leading spaces if less than 3 figs left of decimal
' add leading zeros
for i =1 to len( n$)
c$ =mid$( n$, i, 1)
if c$ =" " or c$ ="%" then nn$ =nn$ +"0" else nn$ =nn$ +c$
next i
FormattedPrint$ =right$( "000000000000" +nn$, length) ' chop to required length
end function </lang>
- Output:
Raw number =0.16045274 Using custom function =0000000000.16045 Raw number =13221.2247 Using custom function =0000013221.22474 Raw number =738.134167 Using custom function =0000000738.13417 Raw number =5.07495908 Using custom function =0000000005.07496 Raw number =4471738.93 Using custom function =0004471738.92920 Raw number =48.7531874 Using custom function =0000000048.75319 Raw number =0.26086972e-1 Using custom function =0000000000.02609 Raw number =0.86559862 Using custom function =0000000000.86560 Raw number =818579.045 Using custom function =0000818579.04498 Raw number =81.460946 Using custom function =0000000081.46095
Logo
Various collection functions, such as MAP and FILTER, will work on individual characters of a string when given a word instead of a list. <lang logo>to zpad :num :width :precision
output map [ifelse ? = "| | ["0] [?]] form :num :width :precision
end print zpad 7.125 9 3 ; 00007.125</lang>
As a debugging feature, you can drop down to C language printf formatting by giving -1 for the width and a format string for the precision. <lang logo>print form 7.125 -1 "|%09.3f| ; 00007.125</lang>
Lua
<lang lua>function digits(n) return math.floor(math.log(n) / math.log(10))+1 end function fixedprint(num, digs) --digs = number of digits before decimal point
for i = 1, digs - digits(num) do io.write"0" end print(num)
end
fixedprint(7.125, 5) --> 00007.125</lang>
An easier way to do that would be
<lang Lua>
print(string.format("%09.3d",7.125))
</lang>
M2000 Interpreter
We can use ? as Print <lang M2000 Interpreter> Print str$(7.125,"00000.000") </lang>
Maple
<lang maple>printf("%f", Pi);
3.141593
printf("%.0f", Pi);
3
printf("%.2f", Pi);
3.14
printf("%08.2f", Pi);
00003.14
printf("%8.2f", Pi);
3.14
printf("%-8.2f|", Pi);
3.14 |
printf("%+08.2f", Pi);
+0003.14
printf("%+0*.*f",8, 2, Pi);
+0003.14</lang>
Mathematica / Wolfram Language
<lang Mathematica>StringTake["000000" <> ToString[7.125], -9] 00007.125</lang>
MATLAB / Octave
<lang MATLAB>>> disp(sprintf('%09.3f',7.125)) 00007.125</lang>
Mercury
<lang>
- - module formatted_numeric_output.
- - interface.
- - import_module io.
- - pred main(io::di, io::uo) is det.
- - implementation.
- - import_module list, string.
main(!IO) :-
io.format("%09.3f\n", [f(7.125)], !IO).
</lang>
min
<lang min>(quote cons "" join) :str-append (pick length - repeat swap str-append) :left-pad
7.125 string "0" 9 left-pad puts!</lang>
- Output:
00007.125
Modula-3
Modules IO and Fmt must be imported before use. <lang modula3>IO.Put(Fmt.Pad("7.125\n", length := 10, padChar := '0'));</lang>
Nanoquery
<lang Nanoquery>printer = 7.125 println format("%09.3f", printer)</lang>
- Output:
00007.125
NetRexx
<lang NetRexx>/* NetRexx */
options replace format comments java crossref savelog symbols binary
import java.text.MessageFormat
sevenPointOneTwoFive = double 7.125
-- using NetRexx Built-In Functions (BIFs) say Rexx(sevenPointOneTwoFive).format(5, 3).changestr(' ', '0')
-- using Java library constructs System.out.printf('%09.3f\n', [Double(sevenPointOneTwoFive)]) say MessageFormat.format('{0,number,#00000.###}', [Double(sevenPointOneTwoFive)])
return </lang>
- Output:
00007.125 00007.125 00007.125
Nim
<lang nim>import strformat const r = 7.125 echo r echo fmt"{-r:9.3f}" echo fmt"{r:9.3f}" echo fmt"{-r:09.3f}" echo fmt"{r:09.3f}"</lang>
- Output:
7.125
-7.125
7.125
-0007.125
00007.125
Oberon-2
Module Out must be imported before use.
<lang oberon2>Out.Real(7.125, 9, 0);</lang>
Objective-C
<lang objc>NSLog(@"%09.3f", 7.125);</lang> or <lang objc>NSLog(@"%@", [NSString stringWithFormat:@"%09.3f", 7.125]);</lang>
OCaml
<lang ocaml>Printf.printf "%09.3f\n" 7.125</lang>
OpenEdge/Progress
<lang Progress (OpenEdge ABL)>MESSAGE
STRING( 7.125, "99999.999" )
VIEW-AS ALERT-BOX.</lang>
Oz
It is possible to set the precision used for float printing (where "precision" means the total number of digits used).
It doesn't seem to be possible to use leading zeros for printing, so we implement this manually: <lang oz>declare
fun {PrintFloat X Prec}
{Property.put 'print.floatPrecision' Prec}
S = {Float.toString X}
in
{Append
for I in 1..Prec-{Length S}+1 collect:C do {C &0} end
S}
end
in
{System.showInfo {PrintFloat 7.125 8}}</lang>
PARI/GP
<lang parigp>printf("%09.4f\n", Pi)</lang>
Pascal
<lang pascal>procedure writeInFixedFormat(n: real); const wholeNumberPlaces = 5; fractionalPlaces = 3; zeroDigit = '0'; negative = '-'; var signPresent: boolean; i: integer; begin // NOTE: This does not catch “negative” zero. signPresent := n < 0.0; if signPresent then begin write(negative); n := abs(n); end;
// determine number of leading zeros i := wholeNumberPlaces; if n > 0 then begin i := i - trunc(ln(n) / ln(10)); end;
for i := i - 1 downto succ(ord(signPresent)) do begin write(zeroDigit); end;
// writes n with // - at least 0 characters in total // - exactly fractionalPlaces post-radix digits // rounded write(n:0:fractionalPlaces); end;</lang>
Perl
<lang perl>printf "%09.3f\n", 7.125;</lang>
Phix
printf(1,"%09.3f\n",7.125)
- Output:
00007.125
PHP
<lang php>echo str_pad(7.125, 9, '0', STR_PAD_LEFT);</lang> or <lang php>printf("%09.3f\n", 7.125);</lang>
PicoLisp
<lang PicoLisp>(pad 9 (format 7125 3)) (pad 9 (format 7125 3 ",")) # European format</lang>
PL/I
<lang PL/I> put edit (X) (p'999999.V999'); /* Western format. */
put edit (X) (p'999999,V999'); /* In European format. */
</lang>
<lang> lz: Proc Options(main);
/********************************************************************* * 10.09.2013 Walter Pachl one way to treat negative numbers * another would be using a Picture of 'S(9)9.V(3)9' or '-(9)9.V(3)9' *********************************************************************/ Call z2lz(1.2); Call z2lz(-1.32); Call z2lz(123456789.012); Call z2lz(-23456789.012); Call z2lz(-123456789.012);
z2lz: Proc(z);
Dcl z Dec Fixed(15,3); ;
Dcl s Char(13) Based(addr(p));
Dcl p Pic'(9)9.V(3)9';
p=z;
If z<0 Then
If left(s,1)='0' Then substr(s,1,1)='-';
Else Do;
Put Skip List(z,'cant be formatted that way');
Return;
End;
Put Skip List(z,s);
End;
End;</lang>
- Output:
1.200 000000001.200
-1.320 -00000001.320
123456789.012 123456789.012
-23456789.012 -23456789.012
-123456789.012 can't be formatted that way
Pop11
The task is underspecified, so we present a few alternatives.
<lang pop11>;;; field of length 12, 3 digits after decimal place format_print('~12,3,0,`*,`0F', [1299.19]);
- prints "00001299.190"
format_print('~12,3,0,`*,`0F', [100000000000000000]);
- Since the number does not fit into the field prints "************"
- that is stars instead of the number
format_print('~12,3,0,`*,`0F', [-1299.19]);
- prints "000-1299.190"
- that is _leading zeros_ before sign
format_print('~3,1,12,`0:$', [1299.19]);
- prints "00001299.190"
format_print('~3,1,12,`0:$', [-1299.19]);
- prints "-0001299.190"
- that is sign before leading zeros
format_print('~3,1,12,`0:$', [100000000000000000]);
- prints "100000000000000000.000"
- that is uses more space if the number does not fit into
- fixed width</lang>
PowerShell
Using the -f formatting operator and a custom format string:
<lang powershell>'{0:00000.000}' -f 7.125</lang>
or by invoking ToString on the number:
<lang powershell>7.125.ToString('00000.000')</lang>
PureBasic
Using RSet() to pad 7.125 with 3 decimals converted to a string, to 8 char length. <lang PureBasic>RSet(StrF(7.125,3),8,"0") ; Will be 0007.125</lang>
Python
Python has 3 different floating point formatting methods: "%e","%f" & "%g". The "%g" format is a beautified hybrid of "%e" and "%f". There is no way of specifying how many digits appear in the exponent when printed with a format.
<lang python>from math import pi, exp r = exp(pi)-pi print r print "e=%e f=%f g=%g G=%G s=%s r=%r!"%(r,r,r,r,r,r) print "e=%9.4e f=%9.4f g=%9.4g!"%(-r,-r,-r) print "e=%9.4e f=%9.4f g=%9.4g!"%(r,r,r) print "e=%-9.4e f=%-9.4f g=%-9.4g!"%(r,r,r) print "e=%09.4e f=%09.4f g=%09.4g!"%(-r,-r,-r) print "e=%09.4e f=%09.4f g=%09.4g!"%(r,r,r) print "e=%-09.4e f=%-09.4f g=%-09.4g!"%(r,r,r)</lang>
- Output:
19.9990999792 e=1.999910e+01 f=19.999100 g=19.9991 G=19.9991 s=19.9990999792 r=19.999099979189474! e=-1.9999e+01 f= -19.9991 g= -20! e=1.9999e+01 f= 19.9991 g= 20! e=1.9999e+01 f=19.9991 g=20 ! e=-1.9999e+01 f=-019.9991 g=-00000020! e=1.9999e+01 f=0019.9991 g=000000020! e=1.9999e+01 f=19.9991 g=20 !
<lang python>from math import pi, exp r = exp(pi)-pi print(r) print("e={0:e} f={0:f} g={0:g} G={0:G} s={0!s} r={0!r}!".format(r)) print("e={0:9.4e} f={0:9.4f} g={0:9.4g}!".format(-r)) print("e={0:9.4e} f={0:9.4f} g={0:9.4g}!".format(r)) print("e={0:-9.4e} f={0:-9.4f} g={0:-9.4g}!".format(r)) print("e={0:09.4e} f={0:09.4f} g={0:09.4g}!".format(-r)) print("e={0:09.4e} f={0:09.4f} g={0:09.4g}!".format(r)) print("e={0:-09.4e} f={0:-09.4f} g={0:-09.4g}!".format(r))</lang>
- Output:
19.9990999792 e=1.999910e+01 f=19.999100 g=19.9991 G=19.9991 s=19.9990999792 r=19.999099979189474! e=-1.9999e+01 f= -19.9991 g= -20! e=1.9999e+01 f= 19.9991 g= 20! e=1.9999e+01 f=19.9991 g=20 ! e=-1.9999e+01 f=-019.9991 g=-00000020! e=1.9999e+01 f=0019.9991 g=000000020! e=1.9999e+01 f=19.9991 g=20 !
R
sprintf brings the printf goodness one expects:
<lang R>> sprintf("%f", pi) [1] "3.141593" > sprintf("%.3f", pi) [1] "3.142" > sprintf("%1.0f", pi) [1] "3" > sprintf("%5.1f", pi) [1] " 3.1" > sprintf("%05.1f", pi) [1] "003.1" > sprintf("%+f", pi) [1] "+3.141593" > sprintf("% f", pi) [1] " 3.141593" > sprintf("%-10f", pi)# left justified [1] "3.141593 " > sprintf("%e", pi) [1] "3.141593e+00" > sprintf("%E", pi) [1] "3.141593E+00" > sprintf("%g", pi) [1] "3.14159" > sprintf("%g", 1e6 * pi) # -> exponential [1] "3.14159e+06" > sprintf("%.9g", 1e6 * pi) # -> "fixed" [1] "3141592.65" > sprintf("%G", 1e-6 * pi) [1] "3.14159E-06"</lang>
formatC also provides C-style string formatting. <lang R>formatC(x, width=9, flag="0")
- "00007.125"</lang>
Other string formatting functions include
format, prettynum
Racket
<lang Racket> -> (displayln (~a 7.125 #:width 9 #:align 'right #:pad-string "0")) 00007.125 </lang>
Raku
(formerly Perl 6) <lang perl6>say 7.125.fmt('%09.3f');</lang>
Raven
<lang raven>7.125 "%09.3f" print
00007.125</lang>
<lang raven>define PI
-1 acos
PI exp PI - as r r print "\n" print r "" prefer "s=%s!\n" print r dup dup dup dup "e=%e f=%f g=%g G=%G!\n" print -1 r * dup dup "e=%9.4e f=%9.4f g=%9.4g!\n" print r dup dup "e=%9.4e f=%9.4f g=%9.4g!\n" print r dup dup "e=%-9.4e f=%-9.4f g=%-9.4g!\n" print r -1 * dup dup "e=%09.4e f=%09.4f g=%09.4g!\n" print r dup dup "e=%09.4e f=%09.4f g=%09.4g!\n" print r dup dup "e=%-09.4e f=%-09.4f g=%-09.4g!\n" print</lang> <lang raven>19.9991 s=19.999100! e=1.999910e+01 f=19.999100 g=19.9991 G=19.9991! e=-1.9999e+01 f= -19.9991 g= -20! e=1.9999e+01 f= 19.9991 g= 20! e=1.9999e+01 f=19.9991 g=20 ! e=-1.9999e+01 f=-019.9991 g=-00000020! e=1.9999e+01 f=0019.9991 g=000000020! e=1.9999e+01 f=19.9991 g=20 !</lang>
REBOL
<lang REBOL>REBOL [ Title: "Formatted Numeric Output" URL: http://rosettacode.org/wiki/Formatted_Numeric_Output ]
- REBOL has no built-in facilities for printing pictured output.
- However, it's not too hard to cook something up using the
- string manipulation facilities.
zeropad: func [ "Pad number with zeros or spaces. Works on entire number." pad "Number of characters to pad to." n "Number to pad." /space "Pad with spaces instead." /local nn c s ][ n: to-string n c: " " s: ""
if not space [ c: "0" if #"-" = n/1 [pad: pad - 1 n: copy skip n 1 s: "-"] ]
insert/dup n c (pad - length? n)
insert n s
n
]
- These tests replicate the C example output.
print [zeropad/space 9 negate 7.125] print [zeropad/space 9 7.125] print 7.125 print [zeropad 9 negate 7.125] print [zeropad 9 7.125] print 7.125</lang>
- Output:
-7.125
7.125
7.125
-0007.125
00007.125
7.125
REXX
<lang rexx>/*REXX program shows various ways to add leading zeroes to numbers. */ a=7.125 b=translate(format(a,10),0,' ') say 'a=' a say 'b=' b say
c=8.37 d=right(c,20,0) say 'c=' c say 'd=' d say
e=19.46 f='000000'e say 'e=' e say 'f=' f say
g=18.25e+1 h=000000||g say 'g=' g say 'h=' h say
i=45.2 j=translate(' 'i,0," ") say 'i=' i say 'j=' j say
k=36.007 l=insert(00000000,k,0) say 'k=' k say 'l=' l say
m=.10055 n=copies(0,20)m say 'm=' m say 'n=' n say
p=4.060 q=0000000000000||p say 'p=' p say 'q=' q say
r=876 s=substr(r+10000000,2) say 'r=' r say 's=' s say
t=13.02 u=reverse(reverse(t)000000000) say 't=' t say 'u=' u
/*stick a fork in it, we're done.*/</lang>
- Output:
a= 7.125 b= 0000000007.125 c= 8.37 d= 00000000000000008.37 e= 19.46 f= 00000019.46 g= 18.25E+1 h= 00000018.25E+1 i= 45.2 j= 00000045.2 k= 36.007 l= 0000000036.007 m= .10055 n= 00000000000000000000.10055 p= 4.060 q= 00000000000004.060 r= 876 s= 0000876 t= 13.02 u= 00000000013.02
Ring
<lang ring> decimals(3) see fixedprint(7.125, 5) + nl
func fixedprint num, digs
for i = 1 to digs - len(string(floor(num)))
see "0"
next
see num + nl
</lang>
Ruby
<lang ruby>r = 7.125 printf " %9.3f\n", r #=> 7.125 printf " %09.3f\n", r #=> 00007.125 printf " %09.3f\n", -r #=> -0007.125 printf " %+09.3f\n", r #=> +0007.125 puts " %9.3f" % r #=> 7.125 puts " %09.3f" % r #=> 00007.125 puts " %09.3f" % -r #=> -0007.125 puts " %+09.3f" % r #=> +0007.125</lang>
Run BASIC
<lang runbasic>print right$("00000";using("#####.##",7.125),8) ' => 00007.13</lang>
Rust
<lang rust> fn main() {
let x = 7.125;
println!("{:9}", x);
println!("{:09}", x);
println!("{:9}", -x);
println!("{:09}", -x);
} </lang>
- Output:
7.125 00007.125 -7.125 -0007.125
Sather
The Fill options should fill with any character, but it is still (!) not implemented; according to ICSI Sather library documentation (GNU Sather library documentation is missing) works only for string, bools and characters, but a test has revealed it does not work in either way (yet) (GNU Sather v1.2.3).
<lang sather>class MAIN is
main is
#OUT + #FMT("<F0 #####.###>", 7.1257) + "\n";
#OUT + #FMT("<F0 #####.###>", 7.1254) + "\n";
end;
end;</lang>
Luckly the C-like formats are supported too:
<lang sather> #OUT + #FMT("%09.3f", 7.125) + "\n";</lang>
Scala
As shown in a Scala Worksheet: <lang Scala>object FormattedNumeric {
val r = 7.125 //> r : Double = 7.125
println(f" ${-r}%9.3f"); //> -7,125
println(f" $r%9.3f"); //> 7,125
println(f" $r%-9.3f"); //> 7,125
println(f" ${-r}%09.3f"); //> -0007,125
println(f" $r%09.3f"); //> 00007,125
println(f" $r%-9.3f"); //> 7,125
println(f" $r%+09.3f"); //> +0007,125
}</lang>
Scheme
Obtain the implementation of SRFI 54 from http://srfi.schemers.org/srfi-54/srfi-54.html and save it as "srfi-54.scm" in directory Gauche/share/gauche/site/lib/
<lang Scheme>(load "srfi-54.scm") (load "srfi-54.scm") ;; Don't ask.
(define x 295643087.65432)
(dotimes (i 4)
(print (cat x 25 3.0 #\0 (list #\, (- 4 i)))))
</lang>
- Output:
00000000002,9564,3087.654 0000000000295,643,087.654 00000002,95,64,30,87.65,4 002,9,5,6,4,3,0,8,7.6,5,4
Seed7
<lang seed7>$ include "seed7_05.s7i";
include "float.s7i";
const proc: main is func
local const float: r is 7.125; begin writeln( r digits 3 lpad 9); writeln(-r digits 3 lpad 9); writeln( r digits 3 lpad0 9); writeln(-r digits 3 lpad0 9); writeln( r digits 3); writeln(-r digits 3); end func;</lang>
- Output:
7.125 -7.125 00007.125 -0007.125 7.125 -7.125
Sidef
<lang ruby>printf("%09.3f\n", 7.125);</lang> or <lang ruby>say ("%09.3f" % 7.125);</lang>
- Output:
00007.125
Smalltalk
<lang smalltalk>Transcript show: (7.125 printPaddedWith: $0 to: 3.6); cr. "output: 007.125000"</lang>
<lang smalltalk>(7.123 asFixedPoint:3) printOn: Transcript leftPaddedTo: 9 with: $0 "output: 00007.125"</lang> notice that printOn:* is implemented in Object;thus any object can be printed with padding this way.
Using the PrintfScanf utility: <lang smalltalk>PrintfScanf new printf:'%08.3f' arguments: { 7.125 }</lang>
SQL
<lang sql>declare @n int select @n=123 select substring(convert(char(5), 10000+@n),2,4) as FourDigits
set @n=5 print "TwoDigits: " + substring(convert(char(3), 100+@n),2,2) --Output: 05</lang>
Standard ML
<lang sml>print (StringCvt.padLeft #"0" 9 (Real.fmt (StringCvt.FIX (SOME 3)) 7.125) ^ "\n")</lang>
<lang sml>print (Format.format "%09.3f\n" [Format.REAL 7.125])</lang>
Stata
See format in Stata help.
<lang stata>. display %010.3f (57/8) 000007.125</lang>
Suneido
<lang Suneido>Print(7.125.Pad(9))</lang>
- Output:
00007.125
Tcl
<lang tcl>set number 7.342 format "%08.3f" $number</lang> Use with puts if output is desired to go to a channel.
TI-89 BASIC
<lang ti89b>right("00000" & format(7.12511, "f3"), 9)</lang>
Toka
<lang toka>needs values value n 123 to n
2 import printf " %08d" n printf</lang>
Ursala
The library function printf calls the host system's C library function by that name and can cope with any of the same numeric formats. <lang Ursala>#import flo
x = 7.125
- show+
t = <printf/'%09.3f' x></lang>
- Output:
00007.125
Vala
<lang Vala>void main() {
double r = 7.125;
print(" %9.3f\n", -r);
print(" %9.3f\n",r);
print(" %-9.3f\n",r);
print(" %09.3f\n",-r);
print(" %09.3f\n",r);
print(" %-09.3f\n",r);
}</lang>
- Output:
-7.125
7.125
7.125
-0007.125
00007.125
7.125
VBA
<lang vb>Option Explicit
Sub Main() Debug.Print fFormat(13, 2, 1230.3333) Debug.Print fFormat(2, 13, 1230.3333) Debug.Print fFormat(10, 5, 0.3333) Debug.Print fFormat(13, 2, 1230) End Sub
Private Function fFormat(NbInt As Integer, NbDec As Integer, Nb As Double) As String 'NbInt : Lenght of integral part 'NbDec : Lenght of decimal part 'Nb : decimal on integer number Dim u As String, v As String, i As Integer
u = CStr(Nb)
i = InStr(u, Application.DecimalSeparator)
If i > 0 Then
v = Mid(u, i + 1)
u = Left(u, i - 1)
fFormat = Right(String(NbInt, "0") & u, NbInt) & Application.DecimalSeparator & Left(v & String(NbDec, "0"), NbDec)
Else
fFormat = Right(String(NbInt, "0") & u, NbInt) & Application.DecimalSeparator & String(NbDec, "0")
End If
End Function </lang>
- Output:
0000000001230.33 30.3333000000000 0000000000.33330 0000000001230.00
VBScript
<lang VBScript> a = 1234.5678
' Round to three decimal places. Groups by default. Output = "1,234.568". WScript.Echo FormatNumber(a, 3)
' Truncate to three decimal places. Output = "1234.567". WScript.Echo Left(a, InStr(a, ".") + 3)
' Round to a whole number. Grouping disabled. Output = "1235". WScript.Echo FormatNumber(a, 0, , , False)
' Use integer portion only and pad with zeroes to fill 8 chars. Output = "00001234". WScript.Echo Right("00000000" & Int(a), 8) </lang>
Vedit macro language
Vedit only supports integers, but fixed point calculations can be used for decimal values.
The following example uses 3 decimal places (value scaled by 1000).
The output is inserted at current edit position.
<lang vedit>#1 = 7125
Num_Ins(#1, FILL+COUNT, 9) Char(-3) Ins_Char('.')</lang>
- Output:
00007.125
Visual Basic
<lang vb> Debug.Print Format$(7.125, "00000.000") </lang> Output (the decimal separator used depends on the system's language settings): <lang vb> 00007.125 </lang>
Wren
<lang ecmascript>import "/fmt" for Fmt
var n = 7.125 System.print(Fmt.rjust(9, n, "0"))</lang>
- Output:
00007.125
XPL0
<lang XPL0>int C; [Format(5, 3); \5 places before decimal point and 3 after RlOut(8, 7.125); \output real number to internal buffer loop [C:= ChIn(8); \read character from internal buffer
if C = ^ then C:= ^0; \change leading space characters to zeros
if C = $1A then quit; \exit loop on end-of-file (EOF = end of chars)
ChOut(0, C); \display digit character on terminal
];
]</lang>
- Output:
00007.125
XSLT
<xsl:value-of select="format-number(7.125, '00000000.#############')" />
zkl
<lang zkl>"%09.3f".fmt(7.125) //-->"00007.125" "%09.3e".fmt(7.125) //-->"7.125e+00" "%09.3g".fmt(7.125) //-->"000007.12" "%09d".fmt(7.125) //-->"000000007" "%09,d".fmt(78901.125)//-->"00078,901"</lang>
ZX Spectrum Basic
<lang zxbasic>10 LET n=7.125 20 LET width=9 30 GO SUB 1000 40 PRINT AT 10,10;n$ 50 STOP 1000 REM Formatted fixed-length 1010 LET n$=STR$ n 1020 FOR i=1 TO width-LEN n$ 1030 LET n$="0"+n$ 1040 NEXT i 1050 RETURN </lang>