Express is a Node.js module that simplifies the process of creating and running web server applications on top of Node.js. You can find more information about Express on the official website at http://expressjs.com/.

You don't need to download or modify anything at this point, as Intel XDK will automatically install the Express module.

We will now see the code to run a simple web server using Express. This is the complete code for this recipe:

// Required modules
var express = require('express');
var app = express();

// Main route
app.get('/', function (req, res) {
  res.send('Hello...