How to produce range with step in Perl

perldoc -f map is one way:

use warnings;
use strict;
use Data::Dumper;

my @ns = map { 5 * $_ } 1 .. 4;
print Dumper(\@ns);

__END__

$VAR1 = [
          5,
          10,
          15,
          20
        ];

See also: perldoc perlop