Thanks for the code, Now I got my keys and values from file 1 in $outputFile. what I need now is to open File2: 
#file2
abcdef
hijkl
mnop
qrstuv
wxyzabc

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compare it one by one with the 'values' of $outputFile and print the key of $outputFile corresponding to the values matched in file2. so that the output wud be like: 
>1
abcdef
>4
xyzabc
.
. 
etc

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In reply to Re^2: Read file in a hash and compare the 'values' from file 2 by Anonymous Monk
in thread Read file in a hash and compare the 'values' from file 2 by Anonymous Monk

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