How to serve different routes

Use the app object to define routes for different URLs. Routes are defined using HTTP methods (such as GET, POST, PUT, DELETE, etc.) and specify a callback function that gets executed when a request matches the specified URL and method.

const express = require('express');
const app = express();
const port = 3000;
 
// get route
app.get('/', (req, res) => {
  res.send('Hello from GET route!');
});
 
// post route
app.post('/add', (req, res) => {
  res.send('Hello from POST route!');
});
 
// PUT route - updation
app.put('/put/:id', (req, res) => {
  res.send('Hello from PUT route!');
});
 
//DELETE route 
app.delete('/delete/:id', (req, res) => {
  res.send('Hello from DELETE route!');
});
 
app.listen(port, () => {
  console.log(`Server is running on http://localhost:${port}`);
});

Response Object Understanding Env