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

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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

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