<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>First Steps Into PHP</title>
</head>

<body>
<form>
    N: <input type="text" name="num" />
    <input type="submit" />
</form>

<?php
if (isset($_GET['num'])) {
    $n = intval($_GET['num']);
    echo $n * 2;
}
?>
</body>
</html>
Create Multiply A Number By Two
Create Multiply A Number By Two
