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.
For example, the number 7.125 could be expressed as "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> The output of this program is
000037.25
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).
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.
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>
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
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 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 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>
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
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>
Result:
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>
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
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>
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>
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>
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>
HicEst
<lang hicest>WRITE(ClipBoard, Format='i5.5, F4.3') INT(7.125), MOD(7.125, 1) ! 00007.125 </lang>
IDL
<lang idl>n = 7.125 print, n, format='(f08.3)'
- ==> 0007.125</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>
Abbreviated sample output:
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
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 printer = 7.125; System.out.printf("%09.3f",printer);//System.out.format works the same way } }</lang> Output:
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.
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>
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>
Mathematica
<lang Mathematica>StringTake["000000" <> ToString[7.125], -9]</lang>
- Output:
00007.125
MATLAB
<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>
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>
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
Nimrod
<lang nimrod>import strfmt const r = 7.125 echo r echo((-r).format("9.3f")) echo(r.format("9.3f")) echo((-r).format("09.3f")) echo(r.format("09.3f"))</lang> Output:
7.1250000000000000e+00
-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
See Delphi
Perl
<lang perl>printf "%09.3f\n", 7.125;</lang>
Perl 6
<lang perl6>say 7.125.fmt('%09.3f');</lang>
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>
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>
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>
REBOL
<lang REBOL>REBOL [ Title: "Formatted Numeric Output" Author: oofoe Date: 2009-12-22 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
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>
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
Ruby
<lang ruby>printf " %09.3f\n", 7.125</lang>
Run BASIC
<lang runbasic>print right$("00000";using("#####.##",7.125),8) ' => 00007.13</lang>
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" $r%+09.3f"); //> +0007,125
}</lang>
Seed7
<lang seed7>$ 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
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>
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
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
XSLT
<xsl:value-of select="format-number(7.125, '00000000.#############')" />
zkl
<lang zkl>"%09.3f".fmt(7.125) //-->"00007.125" "%09d".fmt(7.125) //-->"000000007"</lang>