Generate UUID in JavaScript
JavaScript is a versatile, high-level programming language primarily used for creating interactive web pages. It runs on the client-side of web applications and has become essential for modern web development.
Introduction to JavaScript
JavaScript is a lightweight, interpreted programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it.
Originally created to make web pages interactive, JavaScript has evolved into a full-fledged programming language capable of building complex applications both in the browser and on servers.
- Dynamic Typing: Variables can hold any type of value
- First-Class Functions: Functions are treated as values
- Prototype-Based: Objects inherit from other objects
- Event-Driven: Built for handling user interactions
Getting Started
JavaScript can run in two main environments: the browser and Node.js. Let's start with the basics.
// Your first JavaScript program
console.log('Hello, Dev Lab!');
// Variables
let name = 'Satyam';
const pi = 3.14159;
// Functions
function greet(person) {
return `Hello, ${person}!`;
}
console.log(greet('Developer'));
Note
Modern JavaScript uses let and const instead of var for better scoping.