expressjsHow do I install Express.js?

Installing Express.js is a very simple process. It can be done using the npm install express command in the command line. This command will install the latest version of Express.js.

Once the installation is complete, you can create a simple Express.js app using the following code:

const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

This code will create a simple web server that will listen on port 3000 and respond to requests with the message "Hello World!".

The main parts of the code are:

• const express = require('express'); - This line imports the Express.js module.
• const app = express(); - This line creates an Express.js application.
• app.get('/', (req, res) => { ... }) - This line creates a route that will respond to requests with the message "Hello World!".
• app.listen(3000, () => { ... }) - This line tells the server to listen on port 3000.

For more detailed information on installing and using Express.js, please refer to the Express.js documentation.

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