PHP Practical Slip 4 Q.A

Write a PHP Script which will perform the Addition, Subtraction, Multiplication,and Division of two numbers as per the choice. (Use Switch Case)

<?php
$num1 = 20;
$num2 = 5;
$choice = 1;

switch ($choice) {
    case 1:
        echo "Addition: " . ($num1 + $num2);
        break;

    case 2:
        echo "Subtraction: " . ($num1 - $num2);
        break;

    case 3:
        echo "Multiplication: " . ($num1 * $num2);
        break;

    case 4:
        if ($num2 != 0) {
            echo "Division: " . ($num1 / $num2);
        } else {
            echo "Division by zero is not allowed.";
        }
        break;

    default:
        echo "Invalid Choice.";
}
?>