Parenthesis are regex meta characters and need to be escaped. You can easily do that with the quotemeta function or the "\Q" regex sequence:
my $Check = quotemeta("1()");
if (grep /$Check/i, <FILE>) {
...

[download]
That said, I hope the file is small, because slurping the entire contents of a file into memory is usually not a good strategy.

In reply to Re: Perl GREP by runrig
in thread Perl GREP by rajkrishna89

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