Here is an evil way with that uses a closure that I just read about in the Damian's book Object Oriented Perl : 
use strict;
use vars qw($iterator $next);

$iterator = iterate(0.1,9.4,0.1);

while ($iterator->($next)) {
    # the value is in $next, but since we are
    # iterating by a fraction, some numbers will
    # not be rounded up (e.g. 4.999999 instead of 5.0)
    my ($rounded) =  $next =~ /^(\d+(\.\d)?)/;
    $rounded .= '.0' unless length $rounded > 1;

        print "$rounded\n"; 
}

sub iterate {
        my ($from,$to,$step) = @_;
        my $next = $from - $step;
        my $cref = sub {
                $next += $step;
                return if $next > $to;
                $_[0] = $next;
                return 1;
        };
        return $cref;
}

[download]
Eat your heart out, Java.

UPDATE:
Thanks to alfie and andye for catching the rounding error. Actually, i didn't post this for it's practical use, andye's solution is much more consise and hits the nail on the head - i just thought this was way cool!

Jeff 

R-R-R--R-R-R--R-R-R--R-R-R--R-R-R--
L-L--L-L--L-L--L-L--L-L--L-L--L-L--

In reply to (jeffa) Re: Defining Arrays by jeffa
in thread Defining Arrays by skullbowl

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