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Variable values within for loop

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# 1  
Old 03-17-2015
Variable values within for loop
Hi All

I am trying to fetch the size of three files into three separate variables within a for loop and am doing something like this:

Code:
for i in ATT1 ATT2 ATT3
do
size_$i=`ls -ltr $i | awk '{print $5}'`
echo ${size_$i}
done

but am getting the below error:

Code:
ksh[3]: size_ATT1=522:  not found
ksh[3]: size_ATT2=2170:  not found
ksh[3]: size_ATT3=874:  not found

Any idea how to fix the "not found" error?

Thanks in advance
Last edited by Scrutinizer; 03-17-2015 at 02:24 PM.. Reason: Additional code tags
# 2  
Old 03-17-2015
Try:
Code:
for i in 1 2 3
do
  size[i]=$(ls -l ATT$i | awk '{print $5}')
  echo "${size[i]}"
done

or, since you are using KornShell:
Code:
for i in 1 2 3
do
  ls -l ATT$i | read x x x x size[i] x
  echo "${size[i]}"
done

# 3  
Old 03-18-2015
I tried both the options but am getting

Code:
ksh[3]: ATT1: bad number

The name of each file should get suffixed to the variable being used i.e. size_ATT1 and the echo should return the value stored in the variable as in the size in this case. So the output should be something like:

Code:
size_ATT1=522
size_ATT2=2170
size_ATT3=874

and the echo should only return the values:

Code:
522
2170
874

Not sure if it can be made to work this way
# 4  
Old 03-18-2015
Try using either BASH as shebang or rewrite the shown code to match ksh syntax.
Or, use the array-suggestion from scrutinizer.

Assigning values to a variablename formed by using variables is a complex thing, well, not really, but risky and prone to errors, and should be avoided where possible.
You could write the generated string (all 3 lines of size_ATT{1..3}=...) by writing it to a file, then source it.

hth
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