Welcome to the JavaScript basics guide! Whether you're new to programming or just starting with JavaScript, this tutorial will cover the core concepts you need to build a strong foundation. 🚀

What is JavaScript? 📝

JavaScript is a high-level programming language used to create dynamic content on the web. It runs in the browser and allows you to add interactivity to websites.

JavaScript Logo

Key Features

  • Client-side scripting: Executes in the user's browser
  • Versatile: Works with HTML and CSS
  • Object-oriented: Supports classes and objects
Code Editor

Basic Syntax 🧩

JavaScript uses a simple syntax similar to other C-style languages. Here's a basic structure:

// Comments
// Variables
let message = "Hello, World!";
// Output
console.log(message);

Rules

  • Use ; to end statements
  • Variables are declared with let, const, or var
  • Case-sensitive: myVar ≠ MyVar
Syntax Highlight

Core Concepts 🧠

1. Data Types

  • Primitive types: string, number, boolean, null, undefined, symbol
  • Object types: Arrays, Objects, Functions
Data Types

2. Control Structures

  • Conditional statements: if, else if, else
  • Loops: for, while, do...while
  • Switch cases: For multiple condition checks

3. Functions ✅

Functions are reusable blocks of code. Example:

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

Practice Now 🧪

Try writing your first JavaScript program by following our interactive guide. It includes step-by-step exercises to reinforce what you've learned.

For advanced topics, check out our JavaScript Advanced Tutorial.