Creating Express App Instance

 To create an Express.js application instance, follow these steps:

1. Install Express

Make sure you have Node.js and npm installed. Then, install the express package using npm or yarn.  

• npm install express

2. Create an Application Instance

You can create a new Express app instance in your JavaScript file. Here's a basic example:

•   var express =  require('express');
•   var app = express();
•   console.log(app);

3. Save and Run the Application

Save the file (e.g., index.js) and run it using Node.js

  node index.js