E:\>perl -MO=Deparse,-p -ne"print if 15 .. 17 " LINE: while (defined(($_ = ))) { ((15 .. 17) and print($_)); } -e syntax OK E:\>perl -MO=Deparse -ne"print if 15 .. 17 " LINE: while (defined($_ = )) { print $_ if 15 .. 17; } -e syntax OK