no value in variable

infyanurag · #1 (**permalink**) 08-29-2008

here is a small snippet from the code.

grep -i "updated" testing > testing1
#rm -f testing
Noupdated=`cut -d " " -f1 testing1`
if [ $Noupdated -eq 0 ]
then
echo "No Match Found"
else
echo "Number Of Rows Updated :---> $Noupdated"
fi

the problem is if Noupdated does not have any value, the if condition gives the error.

how to resolve this?

thanks

spirtle · #2 (**permalink**) 08-29-2008

Either use a string comparison

Code:

if [ "$Noupdated" == "0" ]

or test for the variable

Code:

if [ -n "$Noupdated" ] && [ $Noupdated -eq 0 ]

vidyadhar85 · #3 (**permalink**) 08-29-2008

just check..
if [ -z $variablename ]

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