Learn this written chapter step-by-step alongside the CodeToCareer series.
Zero coding experience needed. Learn how JavaScript makes websites interactive, what variables (let, const) are, and write your first script.
A variable in JavaScript is like a labeled storage box: you stick a label on it ('let age = 22'), put a value inside, and whenever you need it later, you look up the box by its label.
If HTML is the structure and CSS is the style, JavaScript is the brain that gives a website life! When you click a button, open a menu, add items to a cart, or fetch data, JavaScript is running behind the scenes.
const & let):In modern JavaScript, you store data using const or let:
const creatorName = "Munish"; // Text (String)
let totalInstalls = 10400; // Number
const isFreeTool = true; // True/False (Boolean)
totalInstalls = totalInstalls + 1; // Updated!console.log():To see what your code is doing, you use console.log():
console.log("Hello, my name is", creatorName);Think of console.log like a walkie-talkie: it beams messages from your code directly into the developer console so you can see what is happening.