And a generic solution: 

for ([9,5], [12,18]) {
   my ($i, $j) = @$_;
   my $f = ($i <= $j ? 1 : -1);

   for ($f*$i .. $f*$j) {
      my $index = $f*$_;
      print("$index\n");
   }
}

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In reply to Re: Perl range by ikegami
in thread Perl range by drake50

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