Re: How to handle numeric variables in sh?

[Scott Milliken]

Here's a code snippet of a script I use often to number a bunch of pics 
in a directory that I think shows how to do what you want to do:

$PICNUM=100
for FNAME in DSC*.JPG
do
  NEWNAME=My_Pictures-$PICNUM.jpg
  mv $FNAME $NEWNAME
  PICNUM=$(($PICNUM+1))
done
This works in /bin/sh from my FreeBSD 4.11 system and also bash.  If you 
want to perform a mathematical operation on a shell variable, just 
surround the expression with $(( expr )) and it'll work.

Hope that helps.
Scott Milliken
Alejandro Pulver wrote:
Hello,
Is there a way to handle numeric variables (addition, multiplication, etc.) in 
'sh' (or throught an external command)?
Thanks and Best Regards,
Ale
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