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I need some help with this

if [ $var -eq 'EASY' ]

but then it says
line 11: [: :: integer expression expected

I don't know what I'm doing wrong

This may be such a simple problem but I don't know what am I doing wrong.
The program I'm trying to do is


for pdb in $(ls *.pdb)
do

res=$(grep 'TYPE 2' $pdb | awk ' {print $1} ')...