Installing Node.js and Running Your First Node.js Application

Node.js is an open-source software that is available for free download on the Node.js download page.

Installation

• For Windows users, click on the Windows Installer
• For Mac users, click on the macOS Installer
• For Linux users, you can install it using a package manager

For example, to install Node.js LTS (v12.x) on Ubuntu, you can run the following commands:

curl -sL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
sudo apt-get install -y nodejs

Your First Hello World Program

Running a JavaScript application with Node.js is quite simple. Let's create a file called index.js with the following content:

console.log('Hello World');

Save the file and run the following command in the command line:

node index.js

Output:

Hello World