Functions

Functions

Functions are reusable blocks of code. Declare them with the function keyword:

function add(a, b) {
    return a + b;
}

console.log(add(3, 4));   // 7
console.log(add(10, 20)); // 30

Default Parameters

Parameters can have default values, used when the caller omits the argument:

function greet(name, greeting) {
    if (greeting === undefined) greeting = "Hello";
    return greeting + ", " + name + "!";
}

console.log(greet("Alice"));          // Hello, Alice!
console.log(greet("Bob", "Hi"));      // Hi, Bob!

Or with the shorthand default syntax:

function greet(name, greeting = "Hello") {
    return greeting + ", " + name + "!";
}

Return Values

Every function returns a value. Without an explicit return, it returns undefined.

function square(n) {
    return n * n;
}
console.log(square(5));   // 25
console.log(square(12));  // 144

Your Task

Write function power(base, exp) that returns base raised to the power exp. Use a loop — do not use Math.pow.