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Old 09-19-2003, 11:49 AM   #1
Registered: Aug 2003
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how to find out if argument is number: bash

how can I find out if an argument to bash is a number rather that anything else?
Old 09-19-2003, 05:12 PM   #2
Registered: Apr 2003
Distribution: Debian Sarge
Posts: 259

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Do you mean an argument to a bash script? If so this works
if `echo $1 | grep -q [^[:digit:]]`; then
   echo $1 is not a number
   echo $1 is a number
This tests the first argument ("$1") to a bash script to so if it contains anything but numbers. If so it is not a number.


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