Pad zeros to a number

Shell Programming and Scripting
1

Pad zeros to a number and assign it to a variable

like i get 1 in $i ,i want it to be $i as 01

2

cat file1
1
2
3
4
5
6

cat file1 | sed 's/^/0/g'

01
02
03
04
-
--

Thanks
Namish

3

any ways thanks for reply..........

i want to pad zero to a run time variable

ie
eg :$i is the variable

if $i =1 it should be like 01
if $i=11 it shoild be 11 itself

4 
i=5
i=`printf "%02s\n" "$i"`
echo "$i"

05
5

If you use ksh, you can use typeset

[/tmp]$ cat test.ksh
#! /bin/ksh

typeset -RZ2 val

val=1
echo $val
val=11
echo $val
[vivarkey@/tmp]$ ./test.ksh 
01
11
[/tmp]$
6

it worked :cool:

7

hey.....

u can also use

var=$1
case $var in
[0-9]) var=0$var
echo $var;;
*) echo $var;;
esac