Node.js is a runtime environment that allows developers to run JavaScript on the server, enabling the creation of scalable backend systems.

Why Node.js?

• Event-Driven Architecture: Ideal for handling real-time applications like chat apps and online games.
• JavaScript Everywhere: Use JavaScript for both frontend and backend development.
• Extensive Ecosystem: npm provides access to thousands of libraries for added functionality.

Basic Example

Here’s a simple Node.js server:

const http = require('http');
const server = http.createServer((req, res) => {
res.end('Hello, World!');
});
server.listen(3000, () => console.log('Server running on port 3000'));


Conclusion

Node.js simplifies backend development and is widely used for building modern web applications.