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Varibale to NULL or ZERO

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# 1  
Old 09-06-2006
Varibale to NULL or ZERO
I have a variable called V_param1 and does it have some value.

I want to check this varibale is NULL or Zero then exit else do

How to incorported this in Script. any input
# 2  
Old 09-06-2006
MySQL
try this snippet :

if [ -z $w ]; then
echo "W is null"
else
echo "W has some value"
fi
# 3  
Old 09-06-2006
we can check with
[[ $d -eq 0 ]] && exit 1

To check run the below script
Code:
d=
echo $d
[[ $d -eq 0 ]] && echo dell

and
Code:
d=
echo "d is $d"
[[ $d -eq 1 ]] && echo "hell $d"

[[ -z $Varname ]] is also correct but it will fail if varname has value 0.
Last edited by Dhruva; 09-06-2006 at 08:21 AM..
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