NodeJS

Hello World in NodeJS:

const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {  
	res.statusCode = 200;  
	res.setHeader('Content-Type', 'text/plain');  
	res.end('Hello World'); 
}); 

server.listen(port, hostname, () => {  
	console.log(`Server running at http://${hostname}:${port}/`); 
});

The printing happens in the res.end('Hello World'); section of code