SW No. 1 - PHP Variable

<?php
//SW No.1 - PHP Variable
//Jet Francis Podaca - 3E

$firstname = "Jet Francis ";
$lastname = "Podaca";
$fullname = $firstname . $lastname;
echo $fullname;


$x = 10;
$y = 7;
$y++;
$x--;
$z = $x + $y;
echo "\nThe sum of variable x and y is $z";

?>