How to run node js web application?
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Answer / Mahfooz Ali
To run a Node.js web application, you need a server like Express.js. First, install Express.js using npm (Node Package Manager). Inside 'app.js', import and set up the Express server:
```javascript
const express = require('express');
const app = express();
```
Then define routes for handling requests:
```javascript
app.get('/', function(req, res) {
res.send('Hello World!');
});
```
Finally, start the server using `app.listen()`:
```javascript
app.listen(3000, function () {
console.log('Example app listening on port 3000!');
});
```
To run the application, type `node app.js` in your terminal.
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