How do I install Express.js?

How do I install Express.js?

To install Express.js, you need to have Node.js installed. Then, run the command npm install express in your terminal.

Do I need to create a package.json file first?

Yes, it's a good practice to create a package.json file. You can do this by running npm init -y before installing Express.

What is Express.js used for?

Express.js is a web application framework for Node.js, designed for building web applications and APIs.

Can you show me a simple example of using Express.js?

Sure! Here's a basic example:

const express = require('express');
const app = express();
app.get('/', (req, res) => {
  res.send('Hello World!');
});
app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});