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JavaScript is a versatile programming language primarily used for creating dynamic and interactive web applications. Below is a concise guide to get started with JavaScript.
1. Setting Up Your Environment
Install a code editor like Visual Studio Code.
Install Node.js from nodejs.org to run JavaScript outside the browser.
Verify Node.js installation:
node -vCopied!✕Copy2. Writing Your First JavaScript Program
Create a file named index.js and write:
console.log("Hello, World!");Copied!✕CopyRun it using Node.js:
node index.jsCopied!✕Copy3. Core Concepts
Variables
Use let, const, or var to declare variables:
let name = "John";const age = 25;var isStudent = true;Copied!✕CopyData Types
JavaScript supports:
Strings: "Hello"
Numbers: 42
Booleans: true, false
Arrays: [1, 2, 3]
Objects: { key: "value" }
Functions
Reusable blocks of code:
function greet(name) {return `Hello, ${name}!`;}console.log(greet("Alice"));Copied!✕CopyControl Flow
Conditional statements and loops:
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