How can I create an anonymous subroutine that can calculate the sum of 1^2 + 2^2 + 3^2 + …. + n^2,(these are exponents) where n is passed by a reference, $p. so far I have this but don't know if this is correct or what i need to change/modify: please help

use CGI qw(:standard);
print header;
print start_html;
print "<form action='$ENV{SCRIPT_NAME}' method='post'>";
print "Enter an integer: <input type='text' name='n'>";
print "<input type='submit' value='Submit'>";
print "</form>";

if (param)
{
$n = param('n');
$p = sub
{
 $sum = 1**2+2**2+3**2+4**2+5**2+6**2+7**+$n**2;
 for ('$i=0; <= $n; $i++')
{
 $sum += $i;
}
 return $sum;
};
print $p->($n);
}
print end_html;

[download]

I have no errors but I feel like my calculation is wrong the results is not what it should be, why?

In reply to Anonymous Subroutine by mimiv89

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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! —
  • 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:
    & &amp;
    < &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.