$Input_filename=$ARGV[0];
    
if (!-d $Input_filename  && ! -e $Input_filename)
{
    print "USAGE: Please enter '$ABCD/def/dsed.txt' as an arguement \n
+";
    exit;
}

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1. Input Is suppose to be something like "$ABCD/def/dsed.txt". if the input is wrong the script should throw an ERROR message. if user enters $ABCD only, error message should be displayed. if user enters "$ABCD/def/", an error message should be displayed. do i need any regex to check it out?? PLEASE SUGGEST.....

In reply to validate user's input by Rash_10oct

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