Both your while loop and your pattern match are using $_ implicitly. This line: while (<>) {is equivalent to: while (defined($_ = <>)) {Similarly, if (/foo/) {is equivalent to: if ($_ =~ /foo/) {Change to using an explicit variable and you should be OK. Look at perlsyn for more details.

In reply to Re: While loop and pattern match (was Re: need help) by VSarkiss
in thread Using regular expressions on user input w/o while: unitialized value by WarrenBullockIII

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