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Add leading zero

 
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# 1  
Old 08-04-2008
Add leading zero
Hi there, I'm trying to add to a number leading zeros if it's just one digit. My code looks like this:
Code:
   d=`date +%d`
   if [ something ]; then 
      d=$((d-1)) # yesterday

      if (length($d) -eq 1); then
         d=0$d

      # this doesn't work if it's the 1st of the month :-(
   fi

...

$d can be instantiated with 04. After d=$((d-1)) $d is 3. Now I want to have it back to 03.
Any idea?
# 2  
Old 08-04-2008
echo $d | awk '{printf("%02d",$d)}'
# 3  
Old 08-04-2008
Thanks!

Actually I wanted to get the date from yesterday and I found this:

Code:
`TZ=CET+24 date +%y%m%d`

# 4  
Old 08-04-2008
well, if its a number, use math, doh !

you know, if its less than 10 (non inclusive ), add a 0

if [ $somevar -gt 10 ]
then
echo "0$somevar"
fi
# 5  
Old 08-04-2008
Using ksh93

Code:
$ printf "%(%y%m%d)T\n" yesterday
080803
$

 
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