# new programmer from C/C++ background my $count = @array_of_stuff; for (my $index=0; $index<$count; ++$index) { $array_of_stuff[$index] = $array_of_stuff[$index]*3; } # Baby perl (?) my @new_array; for (@array_of_stuff) { push @new_array, $_*3; } @array_of_stuff = @new_array; # More advanced: operate on the whole list @array_of_stuff = map { $_*3 } @array_of_stuff