Lab03/exercise2.html at main · mauvepark/Lab03 · GitHub

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Lab3 -- Exercise 2</title>
    </head>
        <body>
            <h1>JavaScript Lab Exercise 2</h1>
            <script>
                // exercise 2A
                /* function add(num1, num2) {
                    return num1 + num2;
                }

                function subtract(num1, num2) {
                    return num1 - num2;
                }

                console.log(add(5, 3));
                console.log(subtract(5, 3));
                */

                // exercise 2B
                /* function add(num1, num2 = 5) {
                    return num1 + num2;
                }

                function subtract(num1, num2 = 5) {
                    return num1 - num2;
                }

                console.log(add(5));
                console.log(subtract(5));
                */

                // exercise 2C
                let add = (num1, num2) => num1 + num2;
                let subtract = (num1, num2) => num1 - num2;

                let multiply = (num1, num2) => num1 * num2;
                let divide = (num1, num2) => {
                    if (num2 === 0) {
                        console.log("Error: Division by zero is not allowed.");
                        return null;
                    }
                    return num1 / num2;
                };

                console.log(add(5, 3));
                console.log(subtract(5, 3));
                console.log(multiply(5, 3));
                console.log(divide(5, 3));
                console.log(divide(5, 0));

                // exercise 2D
                let calculator = (num1, num2, operation) => {
                    switch (operation) {
                        case "add":
                            return add(num1, num2);
                        case "subtract":
                            return subtract(num1, num2);
                        case "multiply":
                            return multiply(num1, num2);
                        case "divide":
                            return divide(num1, num2);
                        default:
                            console.log("Error: Invalid operation");
                            return null;
                    }
                };

                console.log(calculator(5, 3, "add"));
                console.log(calculator(5, 3, "divide"));
            </script>
        </body>
</html>