IF-ELse check (Rafi)

<!DOCTYPE html>
<html >
<head>

</head>
<body>
<form>
    Number 1: <input type="text" name="num1"/>
    <input type="submit"/>
</form>

<?php
if (isset($_GET['num1'])){

    $num1 = intval($_GET['num1']);
    //echo "The Time is: $num1 (Hour of the day)<br/>";

    if ($num1 % 2 == 0) {
        echo "Number is even";
    } else {
        echo "Number is odd";
    }
}
else{
    echo "Please insert a value."
}

?>
</body>
</html>