Nothing is actually wrong with your code. Enter numbers one per line.

$type 1226028.pl
use feature qw(say state);
say "Please input numbers to be summed. Crtl-D to stop";
my $user_total = &total(<STDIN>);
chomp($user_total);

print "The total of inputted numbers is $user_total \n";

sub total {
    state $sum = 0;
    state $number;

    foreach my $number (@_) {
        $sum += $number;
    }

    return $sum;

}

$perl 1226028.pl
Please input numbers to be summed. Crtl-D to stop
12
12
^Z
The total of inputted numbers is 24
[download]

Note: I added 'feature' statement and used CTRL-Z rather than CTRL-D

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.