Installation and usage

The easiest way to install Node.js is to use the installers provided for you at https://nodejs.org. These packages will guide you through the installation of Node.js on your system. Be sure to also install npm, Node's package manager. You can refer to Chapter 3, Nitty-Gritty Grammar, for more details on installation.

Let's give it a go:

1. Open a Terminal window.
2. Type node. You will see a simple > to indicate that Node.js is running.
3. Type console.log("Hi!") and hit Enter.

It's really as simple as that! Exit the command prompt either by hitting Ctrl + C twice or typing .exit.

So, that's fairly basic. Let's do something a bit more interesting. Here's the contents of chapter-11/guessing-game/guessing-game.js:

const readline = require('readline')
const randomNumber = Math.ceil(Math.random() * 10)

const rl = readline.createInterface({
 input: process.stdin,
 output: process.stdout
});

askQuestion()

function askQuestion() ...