JavaScript Functions Explained: The Basics I Finally Understood

While learning JavaScript, I recently started understanding functions.

A function is a reusable block of code that performs a specific task.

Basic Function

function greet() {
    console.log("Hello John!");
}

greet();

Output:

Hello John!

We can also pass values using parameters:

function greet(name) {
    console.log("Hello " + name);
}

greet("John");

Here, name is the parameter, and "John" is the argument.

Returning a Value

Functions can return a value using return:

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

let result = add(10, 20);

console.log(result);

Output:

30

Arrow Function

JavaScript also provides a shorter syntax:

const add = (a, b) => a + b;

The main thing I learned:

Functions help us write reusable, organized, and less repetitive code.

I'm continuing my JavaScript fundamentals step by step.