Looping through an array

<html>

<head><title>Looping through an array</title></head>

<body>
<?php

 $myarray[0] = 45;
 $myarray[1] = 64;
 $myarray[2] = 55;
 $total = 0;

 for ($i=0; $i<3; $i++) {
 		  $total += $myarray[$i];
 }

 echo ("Average Mark: " . ($total/3));

?>
</body>
</html>