JavaScript Fundamentals for Beginners

JavaScript is the programming language of the web. Let’s explore its core concepts.

Variables and Data Types

// Variables
let name = "John";
const age = 25;
var isStudent = true;

// Data types
let number = 42;           // Number
let text = "Hello";        // String
let isActive = false;      // Boolean
let items = [1, 2, 3];     // Array
let user = {              // Object
  name: "John",
  age: 25
};

Functions

// Function declaration
function greet(name) {
  return `Hello, ${name}!`;
}

// Arrow function
const add = (a, b) => a + b;