Formatted numeric output

Task

Express a number in decimal as a fixed-length string with leading zeros.

For example, the number 7.125 could be expressed as 00007.125.

11l

print(‘#05.3’.format(7.125))

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.

	.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

Output:

C:\>prog.exe
00007.125
C:\>_

8th

7.125 "%09.3f" s:strfmt
. cr

Output:

 00007.125

AArch64 Assembly

Works with: as version Raspberry Pi 3B version Buster 64 bits

/* 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

Output:

 -0007.125
 00007.125

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;

Output:

 000037.25

Aime

o_form("/w9s0/\n", 7.125);
o_form("/w12d6p6/\n", -12.0625);
o_form("/w12d6p6/\n", 7.125);

Output:

00007.125
  -12.0625  
    7.125

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

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))
)

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

Amazing Hopper

#include <basico.h>

#proto padzeros(_X_,_S_,_D_)
#proto padmoney(_N_,_D_,_F_,_S_,_P_)

algoritmo

     n={}, '125, 12.39802, 0.0003221, -0.0045, 457897.789' enlistar en 'n'

     fijar separador 'NL'
     imprimir( "Express a number in decimal as a fixed-length string with leading zeros:\n\n",\
               #(pad zeros(n,19,5)), "\n\n",\
               #(pad zeros(n,19,0)), "\n\n",\
               #(pad zeros( (-9873000155.584),19,1)), "\n\n",\
               "Bonus track:\n\n",\
               #(lpad( " ",20,string(n))), "\n\n",\
               #(lpad( " ",20,notation(n))),"\n\n",\
               #(pad money(n,1,".",19,"$")),"\n\n",\
               #(pad money(1980.67,1,"_",16,"USD$"),NL))

terminar

subrutinas

pad zeros(n, l, d)
     decimales 'd'
     s=0, sgn=0
     #( s = string( n * sgn:=(sign(n)) ) )
     #( sgn = string(sgn) )
     si ( s, es matriz? )
         mapear( #(sgn=="-1"), "-", sgn )
         mapear( #(sgn=="1"), " ", sgn )
     sino
         #(sgn=="-1"), entonces{ "-",mover a 'sgn' }
         #(sgn=="1"), entonces{ " ",mover a 'sgn' }
     fin si
     #(cat( sgn, lpad( "0",l,s)))
     decimales normales
retornar

pad money(num, dec, fill, size, prefix)
     #(cat(prefix,lpad(fill,size,money(dec,num))))
retornar

Output:

Express a number in decimal as a fixed-length string with leading zeros:

 0000000000125.00000
 0000000000012.39802
 0000000000000.00032
-0000000000000.00450
 0000000457897.78900

 0000000000000000125
 0000000000000000012
 0000000000000000000
-0000000000000000000
 0000000000000457898

-00000009873000155.6

Bonus track:

                 125
           12.398020
            0.000322
           -0.004500
       457897.789000

        1.250000e+02
        1.239802e+01
        3.221000e-04
       -4.500000e-03
        4.578978e+05

$..............125.0
$...............12.4
$................0.0
$...............-0.0
$..........457,897.8

USD$_________1,980.7

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)

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

APL

      'ZF15.9' ⎕FMT 7.125
00007.125000000

APL's ⎕FMT is similar to C's printf (only it operates on arrays).

ARM Assembly

Works with: as version Raspberry Pi

/* 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

Arturo

r: 7.125

print r
print to :string .format: "09.3f" r

Output:

7.125
00007.125

AutoHotkey

contributed by Laszlo on the ahk forum

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)
}

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
}

Same output as the C code.

BASIC

ANSI BASIC

Works with: Decimal BASIC

100 REM Formatted numeric output
110 LET N = 7.125
120 PRINT USING ("%%%%.###"): N
130 PRINT USING ("****.###"): N
140 PRINT USING ("####.###"): N
150 PRINT USING ("+%%%.###"): N
160 PRINT USING ("+%%%.###"): -N
170 PRINT USING (".###^^^^^"): N
180 PRINT USING ("#.###^^^^^"): N
190 PRINT USING ("##.###^^^^^"): N
200 PRINT USING ("+.###^^^^^"): -N
210 END

Output:

 
0007.125
***7.125
   7.125
+007.125
-007.125
.713E+001
7.125E+000
71.250E-001
-.713E+001

BaCon

BaCon can use C style printf format specifiers.

' Formatted numeric output
n = 7.125
PRINT n FORMAT "%09.3f\n"

Output:

prompt$ ./formatted
00007.125

BBC BASIC

      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)

Output:

00003.142
-0003.142

BASIC256

n = 7.125
print rjust(string(n), 8, "0")  # => 00007.125
print zfill(string(n), 8)       # => 00007.125

Chipmunk Basic

This example is in need of improvement:

It does not express numbers with unknown length as a fixed-length string (e.g. 777.125 or 77.125 result in too long string).

10 print using "0000#.###";7.125

Output:

00007.125

FreeBASIC

' FB 1.05.0 Win64

#Include "vbcompat.bi"

Dim s As String  = Format(7.125, "00000.0##")
Print s
Sleep

Output:

00007.125

IS-BASIC

100 LET F=7.125
110 PRINT USING "-%%%%%.###":F

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.

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

Output:

Raw number = 0.92349667e-2  Using custom function = 0000000000.00923
Raw number = 0.45244905     Using custom function = 0000000000.45245
Raw number = 3084321.68     Using custom function = 0003084321.68220
Raw number = 545.557351     Using custom function = 0000000545.55735
Raw number = 765.455263     Using custom function = 0000000765.45526
Raw number = 650413.092     Using custom function = 0000650413.09248
Raw number = 0.85554345     Using custom function = 0000000000.85554
Raw number = 296.155771     Using custom function = 0000000296.15577
Raw number = 8.3816344      Using custom function = 0000000008.38163
Raw number = 0.1007265e-2   Using custom function = 0000000000.00101

Nascom BASIC

Translation of: ZX Spectrum Basic

Works with: Nascom ROM BASIC version 4.7

10 REM Formatted numeric output
20 CLS
30 LET N=7.125
40 LET W=9
50 GOSUB 1000
60 SCREEN 10,9:PRINT N$
70 END 
1000 REM Formatted fixed-length
1010 N$=STR$(N):N$=RIGHT$(N$,LEN(N$)-1)
1020 FOR I=1 TO W-LEN(N$)
1030 N$="0"+N$
1040 NEXT I
1050 RETURN

PureBasic

Using RSet() to pad 7.125 with 3 decimals converted to a string, to 8 char length.

RSet(StrF(7.125,3),8,"0")    ; Will be 0007.125

QBasic

Works with: QBasic version 1.1

Works with: QuickBasic version 4.5

n = 7.125
PRINT USING ("0000#.###"); n    ' => 00007.125

Run BASIC

print right$("00000";using("#####.##",7.125),8) ' => 00007.13

SmallBASIC

print format("00000.000", 7.125)

TI-89 BASIC

This example is in need of improvement:

It does not handle negative numbers.

right("00000" & format(7.12511, "f3"), 9)

True BASIC

LET n = 7.125
PRINT USING ("0000#.###"): n      ! => 0007.125
END

VBA

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

Output:

0000000001230.33
30.3333000000000
0000000000.33330
0000000001230.00

VBScript

Works with: Windows Script Host version *

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)

Visual Basic

Works with: Visual Basic version VB6 Standard

Debug.Print Format$(7.125, "00000.000")

Output (the decimal separator used depends on the system's language settings):

00007.125

XBasic

Works with: Windows XBasic

PROGRAM	"progname"
VERSION	"0.0000"

DECLARE FUNCTION  Entry ()

FUNCTION  Entry ()
    n! = 7.125
    PRINT FORMAT$("0000#.###", n!)
END FUNCTION
END PROGRAM

Output:

00007.125

Yabasic

n = 7.125
print n using ("#####.###")     // =>     7.125
print str$(n, "%09.3f")         // => 00007.125

ZX Spectrum Basic

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

bc

First define a custom function for numeric output.

/*
 * 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. */
}

Then use this function to print 7.125 with 9 characters.

x = 7.125
"Decimal: "; t = p(x, 9); "
"
ibase = 16
"Hexadecimal: "; t = p(x, 9); "
"
ibase = 2
"Binary: "; t = p(x, 1001); "
"
quit

Output:

Decimal: 00007.125
Hexadecimal: 0000007.2
Binary: 00111.001

Beads

beads 1 program 'Formatted numeric output'
calc main_init
	var num = 7.125
	log to_str(num, min:9, zero_pad:Y)

Output:

00007.125

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;
}

Output:

C#

class Program
    {


        static void Main(string[] args)
        {

            float myNumbers = 7.125F;
            
            string strnumber = Convert.ToString(myNumbers);
                       
            Console.WriteLine(strnumber.PadLeft(9, '0'));
           
            Console.ReadLine();
        }
        

             
       
    }

C++

#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;
}

C++20

#include <iostream>
#include <format>
 
int main()
{
  std::cout << std::format("{:09.3f}\n", 7.125);
  return 0;
}

Clojure

Translation of: Common Lisp

Using cl format strings

(cl-format true "~9,3,,,'0F" 7.125)

Translation of: java

Using java format strings

(printf "%09.3f" 7.125) ; format works the same way (without side the effect of printing)

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).

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.

Output:

00007.125

Common Lisp

(format t "~9,3,,,'0F" 7.125)

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);
}

Output:

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

dc

Translation of: bc

First define a custom function for numeric output.

[*
 * (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

Then use this function to print 7.125 with 9 characters:

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

Output:

Decimal: 00007.125
Hexadecimal: 0000007.2
Binary: 00111.001

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.

Output:

00007.125
00007.1250000
7.1250000
7
7.1E0
7.13

DuckDB

Works with: DuckDB version V1.1

Works with: DuckDB version V1.0

DuckDB supports string formatting using the widespread printf() conventions and also the fmt mini-language :

SELECT printf('%09.3f', 7.125), format('{:09.3f}', 7.125);

Output:

┌─────────────────────────┬───────────────────────────┐
│ printf('%09.3f', 7.125) │ format('{:09.3f}', 7.125) │
│         varchar         │          varchar          │
├─────────────────────────┼───────────────────────────┤
│ 00007.125               │ 00007.125                 │
└─────────────────────────┴───────────────────────────┘

Here's a typescript showing how to avoid the tabular decorations:

D .headers off
D .mode list
D SELECT printf('%09.3f', 7.125);
00007.125
D SELECT format('{:09.3f}', 7.125);
00007.125

Eiffel

Works with: Eiffel Studio version 6.6

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

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]

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

(format "%09.3f" 7.125) ;=> "00007.125"

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

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

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

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)

Output:

F#

printfn "%09.3f" 7.125f

Factor

USE: formatting
7.125 "%09.3f\n" printf

Output:

00007.125

Fantom

class Main
{
  public static Void main()
  {
    echo (7.125.toStr.padl(9, '0'))
  }
}

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.)

\ 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 ;

Usage example:

Type:    123 s>d  8 ud.0
Result:  00000123 ok
Type:    -123 s>d 8 d.0
Result:  -00000123 ok

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

Works with: Fortran version 90 and later

Using standard data edit descriptors it is only possible to precede Integer data with leading zeros.

INTEGER :: number = 7125
WRITE(*,"(I8.8)") number   ! Prints 00007125

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.

      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

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

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.

In this page you can see and run the program(s) related to this task and their results. You can also change either the programs or the parameters they are called with, for experimentation, but remember that these programs were created with the main purpose of showing a clear solution of the task, and they generally lack any kind of validation.

FutureBasic

window 1, @"Formatted Numeric Output", (0,0,480,270)
// option 1
print using "0000#.###";7.125

// option 2
printf @"%09.3f",7.125

Gambas

Click this link to run this code

Public Sub Main()

Print Format("7.125", "00000.000")

End

Output:

00007.125

gnuplot

print sprintf("%09.3f", 7.125)

Go

fmt.Printf("%09.3f", 7.125)

Groovy

Solution:

printf ("%09.3f", 7.125)

Output:

00007.125

Haskell

import Text.Printf
main =
  printf "%09.3f" 7.125

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

HicEst

WRITE(ClipBoard, Format='i5.5, F4.3') INT(7.125), MOD(7.125, 1)    ! 00007.125

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))
}

Icon and Unicon

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

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|

Library: Icon Programming Library

provides printf

IDL

n = 7.125
print, n, format='(f08.3)'
;==> 0007.125

J

   'r<0>9.3' (8!:2) 7.125
00007.125

Documentation on 8!:

Java

Works with: Java version 1.5+

Stealing printf from C/C++:

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));
	}
}

Output:

000000007.125
000000007.125

Using NumberFormat:

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
	}
}

Output:

000000007.125
00007.12500
00007.12
00007.14

JavaScript

var n = 123;
var str = ("00000" + n).slice(-5);
alert(str);

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.

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);

Examples:

(1.0, 12.3, 333.333, 1e6) | pp0(10)

produces

(1.0, 12.3, 333.333, 1e6) | pp(4;2)

produces

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").

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

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

// version 1.0.5-2

fun main(args: Array<String>) {
    val num = 7.125
    println("%09.3f".format(num))
}

Output:

00007.125

Lambdatalk

Lambdatalk has no primitive for numeric output. This is a way to define it:

{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

Lasso

7.125 -> asstring(-precision = 3, -padding = 9, -padchar = '0')

Output:

00007.125

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.

to zpad :num :width :precision
  output map [ifelse ? = "| | ["0] [?]] form :num :width :precision
end
print zpad 7.125 9 3  ; 00007.125

Works with: UCB Logo

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.

print form 7.125 -1 "|%09.3f|    ; 00007.125

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

An easier way to do that would be

 print(string.format("%09.3d",7.125))

M2000 Interpreter

We can use ? as Print

Print str$(7.125,"00000.000")

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

Mathematica / Wolfram Language

StringTake["000000" <> ToString[7.125], -9]
00007.125

MATLAB / Octave

>> disp(sprintf('%09.3f',7.125))
00007.125

Maxima

Translation of: Common Lisp

printf(false,"~9,3,,,'0F",7.125);

Output:

"00007.125"

Mercury

:- 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).

min

Works with: min version 0.37.0

(pick length - repeat prefix) ^left-pad

7.125 string "0" 9 left-pad puts!

Output:

00007.125

Modula-3

Modules IO and Fmt must be imported before use.

IO.Put(Fmt.Pad("7.125\n", length := 10, padChar := '0'));

Nanoquery

printer = 7.125
println format("%09.3f", printer)

Output:

00007.125

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

Output:

00007.125
00007.125
00007.125

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}"

Output:

Oberon-2

Module Out must be imported before use.

Out.Real(7.125, 9, 0);

Objective-C

NSLog(@"%09.3f", 7.125);

or

NSLog(@"%@", [NSString stringWithFormat:@"%09.3f", 7.125]);

OCaml

Printf.printf "%09.3f\n" 7.125

OpenEdge/Progress

MESSAGE
   STRING( 7.125, "99999.999" )
VIEW-AS ALERT-BOX.

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:

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}}

PARI/GP

Works with: PARI/GP version 2.4.3 and above

printf("%09.4f\n", Pi)

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;

PascalABC.NET

##
var Pi := 3.1415926536;
Println($'{Pi,8:f2}');
Println($'{Pi,-8:f3}!');

Output:

    3.14
3.142   !

Perl

Works with: Perl version 5.x

printf "%09.3f\n", 7.125;

Phix

Library: Phix/basics

printf(1,"%09.3f\n",7.125)

Output:

 00007.125

PHP

echo str_pad(7.125, 9, '0', STR_PAD_LEFT);

or

printf("%09.3f\n", 7.125);

PicoLisp

(pad 9 (format 7125 3))
(pad 9 (format 7125 3 ","))  # European format

PL/I

put edit (X) (p'999999.V999'); /* Western format. */

put edit (X) (p'999999,V999'); /* In European format. */

 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,'can''t be formatted that way');
     Return;
     End;
 Put Skip List(z,s);
 End;
 End;

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.

;;; 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

PowerShell

Using the -f formatting operator and a custom format string:

'{0:00000.000}' -f 7.125

or by invoking ToString on the number:

7.125.ToString('00000.000')

Python

Works with: Python version 2.5

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.

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)

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       !

Works with: Python version 3

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))

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       !

Quackery

Behaviour of format ( $ a b --> $ )

Accepts a well formatted numerical string $, optionally with a decimal point, without validation.

a is the number of digits before the decimal point. b is the number of digits after the decimal point.

Returns a string $ with either a leading zero or a leading space, then at least a digits, then a decimal point, then at least b digits. The digits are padded with zeroes fore and aft if required.

"at least" – if there are already more digits before the point than a, and/or more digits after the point than b, it will not crop the number. IMO, it is better to mess up the formatting than to display an incorrect number. Check the $ is not too long fore or aft before passing to format if the string may be truncated.

  [ over find swap found ]     is has       (   $ c --> b )

  [ over 0 peek
    char - = iff
      [ dip [ behead drop ]
        true unrot ]
    else [ false unrot ]
    over char . swap find
    -  char 0 swap of
    swap join
    swap iff char -
    else space
    swap join ]                is left-pad  (   $ n --> $ )

   [ over char . has not if
       [ dip [ char . join ] ]
     over char . swap find
     dip [ over size ]
     1+ - -
     char 0 swap of
     join ]                    is right-pad (   $ n --> $ )

  [ dip left-pad right-pad ]   is format    ( $ n n --> $ )

  ' [ $ "7.125"
      $ "-7.125"
      $ "0.125"
      $ "-0.12"
      $ "7.12"
      $ "-7.12"
      $ "0.12"
      $ "-0.12"
      $ "7"
      $ "-7"
      $ "0" ]
  witheach
    [ do 5 3 format echo$ cr ]

Output:

R

sprintf brings the printf goodness one expects:

> 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"

formatC also provides C-style string formatting.

formatC(x, width=9, flag="0")
# "00007.125"

Other string formatting functions include

format, prettynum

Racket

-> (displayln (~a 7.125 #:width 9 #:align 'right #:pad-string "0"))
00007.125

Raku

(formerly Perl 6)

say 7.125.fmt('%09.3f');

Raven

7.125 "%09.3f" print

00007.125

Translation of: Python

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

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       !

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

Output:

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.*/

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

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

RPL

Number formatting in RPL is at 1980s standards (ANSI BASIC X3J2, 1983 to be precise). If the user wants something else, she/he has to write some code, formatting the number as a string.

≪ 1 CF IF OVER 0 < THEN 1 SF 1 - END
  SWAP ABS →STR 
  WHILE DUP2 SIZE > REPEAT
      "0" SWAP + END
  IF 1 FS? THEN "-" SWAP + END
  SWAP DROP
≫ 'TASK' STO

Input:

7.125 9 TASK
-7.125 9 TASK

Output:

2: "00007.125"
1: "-0007.125"

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

Rust

fn main() {
    let x = 7.125;

    println!("{:9}", x);
    println!("{:09}", x);
    println!("{:9}", -x);
    println!("{:09}", -x);
}

Output:

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).

class MAIN is
  main is
    #OUT + #FMT("<F0 #####.###>", 7.1257) + "\n";
    #OUT + #FMT("<F0 #####.###>", 7.1254) + "\n";
  end;
end;

Luckly the C-like formats are supported too:

    #OUT + #FMT("%09.3f", 7.125) + "\n";

Scala

Library: Scala

Works with: Scala version 2.10.2

As shown in a Scala Worksheet:

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
}

Scheme

Works with: Gauche 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/

(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)))))

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

$ 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;

Output:

Sidef

printf("%09.3f\n", 7.125);

or

say ("%09.3f" % 7.125);

Output:

00007.125

Smalltalk

Works with: Pharo 1.1.1

Transcript show: (7.125 printPaddedWith: $0 to: 3.6); cr.
"output: 007.125000"

Works with: Smalltalk/X

(7.123 asFixedPoint:3)  printOn: Transcript leftPaddedTo: 9 with: $0 
"output: 00007.125"

notice that printOn:* is implemented in Object;thus any object can be printed with padding this way.

Using the PrintfScanf utility:

PrintfScanf new printf:'%08.3f' arguments: { 7.125 }

SQL

Works with: MS SQL version 2005

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

Standard ML

print (StringCvt.padLeft #"0" 9 (Real.fmt (StringCvt.FIX (SOME 3)) 7.125) ^ "\n")

Works with: SML/NJ

print (Format.format "%09.3f\n" [Format.REAL 7.125])

Stata

See format in Stata help.

. display %010.3f (57/8)
000007.125

Suneido

Print(7.125.Pad(9))

Output:

00007.125

Tcl

set number 7.342
format "%08.3f" $number

Use with puts if output is desired to go to a channel.

Toka

needs values
value n
123 to n

2 import printf
" %08d" n printf

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.

#import flo

x = 7.125

#show+

t = <printf/'%09.3f' x>

Output:

00007.125

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);
}

Output:

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.

#1 = 7125
Num_Ins(#1, FILL+COUNT, 9) Char(-3) Ins_Char('.')

Output:

 00007.125

V (Vlang)

fn main() {
	// refer to string interpolation and format place holding in documentation
	// pad with zeros towards the left
	num := 7.125
	println("${num:09f}")
}

Output:

00007.125

Wren

Library: Wren-fmt

import "./fmt" for Fmt

var n = 7.125
System.print(Fmt.rjust(9, n, "0"))

Output:

00007.125

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
        ];
]

Output:

00007.125

XSLT

<xsl:value-of select="format-number(7.125, '00000000.#############')" />

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"