Is Number Even

phpEvenCheck.php

<?
// this is more the PHP-way
// requires the bcmath extension so make sure your shared hosting provider has it.

is_even($argv[1]);

function is_even($number) {
  $oldnumber = $number;
  goto a;
  result:
    if ($result) goto noteven;
    goto notodd;
  a:
    $number = bcadd($number, "-1");
    $result = !$result;
    if(bccomp($number, "0") == null) goto result;  
    goto a;
  notodd:
    echo "$oldnumber is even";
    goto end;
  noteven:
    echo "$oldnumber is odd";
  end:
    echo "\n";
}