JavaScript basics

JavaScript Basics


Colour … : Example codes

1. JavaScript Basics

 Variables: Used to store data values.
o Declared using var, let, or const.
o Example:

js

let age = 25;
const pi = 3.14;

 Data Types: JavaScript has several data types such as:
o Primitive: string, number, boolean, null, undefined, symbol.
o Non-primitive: objects (arrays, objects).

2. Functions

 Functions allow you to encapsulate code for reusability.
o Syntax:

js

function greet(name) {
return `Hello, ${name}`;
}

 Arrow Functions (ES6):

js

const greet = (name) => `Hello, ${name}`;

3. Control Structures

 Conditional Statements: if, else if, else, and switch.

js

if (age >= 18) {
console.log("Adult");
} else {
console.log("Minor");
}

 Loops: for, while, do...while.