use strict;
use warnings;

my @array = ( -11, -13, 4, 22, 17);
print "Result: ",find_max_odd(@array) // "undefined", "\n";

sub find_max_odd {
   my $max; 
   for (@_) {
      next unless $_ % 2;
      unless ( defined $max ) {
         $max = $_;
         next;
      }
      $max = $_ if $_ > $max;
   }
   return $max;
}