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Assigning inside for loop

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# 1  
Old 07-25-2008
Assigning inside for loop
If I have 3 variables and I want to check if any of these is null. If one of them is null then it should be assigned a value of 0.I have the following code below.
The output should be 0 is A, 11 is B, 33 is C


Code:
$a=
$b=11
$c=33
$echo $a $b $c
$11 33

for i in "${a}" "${b}" "${c}";
do
 if [ "${i}" = "" ];then
   Assign the value to 0
 fi
done

echo After
echo $a is A, $b is B, $c is C

# 2  
Old 07-25-2008
Rather than use a loop and get into eval or nameref why not keep it simple and do something like the following
Code:
[[ -z $a ]] && a=0
[[ -z $b ]] && b=0
[[ -z $c ]] && c=0

# 3  
Old 07-25-2008
Thanks Smilie
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