JavaScript Basics

Welcome to the basics of JavaScript! JavaScript is a programming language that allows you to create interactive web pages. It is an essential skill for any web developer.

Why Learn JavaScript?

Interactivity: Add dynamic elements to your web pages.
Rich Web Applications: Build complex web applications with frameworks like React, Angular, and Vue.
Cross-Platform: Use JavaScript to create applications for different platforms, including web, mobile, and desktop.

Getting Started

Here's a simple example of a JavaScript program:

console.log("Hello, world!");

You can run this code in your browser's developer console or in a JavaScript environment like Node.js.

Syntax

JavaScript is a high-level, interpreted language with dynamic typing. It uses a C-like syntax.

Variables

In JavaScript, you can declare variables using var, let, or const.

var: Declares a variable that is hoisted to the top of its function or global scope.
let: Declares a block-scoped variable.
const: Declares a variable whose value cannot be reassigned.

Example:

var age = 25;
let name = "John";
const pi = 3.14159;

Control Structures

JavaScript uses standard control structures like if, else, for, while, and switch.

Example:

if (age > 18) {
  console.log("You are an adult.");
} else {
  console.log("You are not an adult.");
}

Functions

Functions in JavaScript are defined using the function keyword.

Example:

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

greet("John");

Resources

To learn more about JavaScript, visit our JavaScript Tutorial.