One way: 
use warnings;
use strict;

my $i    = 0;
my $pattern;
while (my $line = <DATA>) {
        chomp $line;
        $pattern  = '>';
        if ($line =~ s/^$pattern//) {
                $i++;
                print "$i: $line \n";
        }
}
__DATA__
>foo

[download]

Now it's up to you to figure out how you explain to your professor that someone on the internet did your homework for you.

In reply to Re: Pattern finding and printing with regex by toolic
in thread Pattern finding and printing with regex by kernelpanic@thedisco

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