Relevant to the functionality but not to the OP's question:

Built-in variable $. is the number of lines read from the current (i.e. last-read) file handle. So:

while ( <> ) {
    last if m/perl/i;
}
print "There were $. lines until I found perl\n";

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In reply to Re: mixed case with match by Anonymous Monk
in thread mixed case with match by catfish1116

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