The result is:
\n"; $n = $_GET['n_value']; $i = 1; $s = ($n == 0) ? 0 : 1; $s_string = ($n == 0) ? '0 ' : '1 '; while ($i < $n) { $i++; $s = $s + $i; $s_string = $s_string."+ $i "; } echo "S($n) = $s_string"."= $s"; echo "
\n".'recompute.
'; echo "\n".'Other curious facts on 1+2+3+4+....
'; } else { echo 'This calculator computes the Little Gauss sum, S(n) = 1 + 2 + 3 + ... + (n-1) + n:
'; } ?>