Introduction to JavaScript

JavaScript is a lightweight interpreted language with first-class functions, originally created to add interactivity to web pages.

js, and in mobile apps via React Native — making it one of the most versatile languages.

snippet

// Your first JavaScript program
console.log("Hello, InkAndHorizon!");

// Variables
const name = "Developer";
let age = 25;

console.log(`Welcome, ${name}!`);

Key Insights

JavaScript is interpreted, not compiled

Runs natively in every modern browser

Use const for constants, let for mutable variables

Single-threaded but non-blocking via the event loop