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Shell Programming and Scripting

Zero fill a string

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# 1  
Old 02-22-2010
Zero fill a string
How do I zero fill a string. E.g pad a string to two digits

Code:
m=`date "+%m"`
pm=`expr $m - 1`
echo $pm

the above code echoes 1. I want it to echo 01. Any ideas?
# 2  
Old 02-22-2010
Code:
printf '%02d' $pm

# 3  
Old 02-22-2010
In Korn Shell
Code:
$ cat zerofill.ksh
#!/bin/ksh

m=`date "+%m"`
pm=`expr $m - 1`
echo $pm
typeset -Z2 ZERO_FILLED_NEXT_DAY=$pm
echo "ZERO_FILLED_NEXT_DAY=$ZERO_FILLED_NEXT_DAY"

exit 0

$ ./zerofill.ksh
1
ZERO_FILLED_NEXT_DAY=01

# 4  
Old 02-22-2010
Thanks Smilie
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