CodeBustar!

To set up a Node.js and Express application to create an API, you can follow these steps:

1. Install Node.js on your computer if it is not already installed. You can download the installer from the official website: https://nodejs.org/en/download/

2. Create a new directory for your project and navigate to it in the command line.

3. Initialize the project by running the command npm init. This will create a package.json file in your project directory.

4. Install the Express.js framework by running the command npm install express.

5. Create a new file called app.js or server.js in your project directory. This file will be the entry point for your application.

6. In the app.js file, require the express module and create a new Express application:

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

7. Define routes for your API by using the app.get() or app.post() method. For example:

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

8. Start the server by adding the following line to the bottom of your app.js file:

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

9. Run the application by using the command node app.js or node server.js in the command line.

10. You should now be able to make requests to your API by going to http://localhost:3000 in your web browser.