Unable to understand warnings in perl

Unable to understand warnings in perl

I have the following code
#! /usr/bin/perl
use strict;
use warnings;
################### Start Main ####################
my @startupPrograms = qw(google-chrome thunderbird skype pidgin );
my @pagesToBeOpenedInChrome = qw(http://www.google.com/
http://stackoverflow.com/ https://mail.google.com/mail/u/0/#inbox);
main();
#################################################
sub main() {
}
and I get following warning
[aniket@localhost TestCodes]$ ./test.pl
Possible attempt to put comments in qw() list at ./test.pl line 8.
main::main() called too early to check prototype at ./test.pl line 9.
Program works fine but I am not able to understand the warnings. What do
they mean?