#!/usr/bin/perl # use strict; use warnings; use List::MoreUtils qw(any uniq); my @line_numbers = (1,2,5,6,9,10,18,19,23,24,25,30,31,33); my $line_number = 0; foreach my $li (1..35) { if (any {$line_number} @line_numbers) { print "$line_number :\n"; } $line_number++; }