How to validate input parameter ??

[try2222]

Hi all,

According to you, is it possible to check if the input parameters of a shell-script is numeric??.

If it's possible can you describe me precisely how to implement it????

Thanks in advance for any help or suggestion.

By to all.

 

[dickiebird]

One way ( there'll be better ones )
(Only works for positive integers)

if [ ${1} -gt 0 ]
then
echo is numeric
else
echo aint numeric
fi

This creates an error if non-numeric data is passed, so run the script with 2>/dev/null
HTH Dickie Bird (-)))

 

[J1mbo]

This ksh script tests for negative values and values with decimal places:

#! /bin/ksh
if [[ $1 = ?(-)?(.)[0-9]*?(.)?([0-9])[!A-Za-z] ]] ; then
print "is numeric"
else
print "is NOT numeric"
fi


-jim

 

[gregor weertman]

[ -z "${variable#[0-9]}" ] && echo variable is a number.


regards
Gregor. Gregor.Weertman@mailcity.com