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

app.get('/', (req, res) => {
    res.send('Welcome to Express Server');
});

app.get('/html', (req, res) => {
    res.send('<h1>Hello from Express</h1>');
});

app.get('/json', (req, res) => {
    res.json({ message: 'Hello, Express!' });
});

app.listen(3000, () => {
    console.log('Express server running at http://localhost:3000/');
});