use warnings;
use strict;

my @arr = (10,10,20,0x47,1,30,45,45);

sub do_it_all {
    my $biggest = shift @_;
    foreach my $num (@_) {
        if ($num > $biggest) {
            $biggest = $num;
        }
    }

        my $smallest = shift @_;
        foreach my $smallnum (@_) {
            if ($smallnum < $smallest) {
                $smallest = $smallnum;
            }
        }
            print "\$smallest = $smallest\t\$biggest = $biggest\n";
            my @unique = ($smallest..$biggest);
        print "@unique\n";
        
}

&do_it_all(@arr);



##</code><code>##

C:\>perl no_sort.pl
$smallest = 1   $biggest = 71
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
 61 62 63 64 65 66 67 68 69 70 71