Understanding NodeJS With Examples – Programmingempire

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In this article on Understanding NodeJS With Examples, I will explain this server-side JavaScript runtime environment along with some examples.

To begin with, let us first discuss the features of the node.js framework.

  • Basically, Node.js is built on chrome’s V8 engine.
  • It is open-source.
  • It is a back-end JavaScript runtime environment and can execute JavaScript outside of the browser.
  • Since it is based on JavaScript, node.js is cross-platform.
  • Furthermore, it is single-threaded. It means all requests run within the same thread.
  • Besides. it is highly scalable.
  • It is very fast.
  • Moreover, it requires no buffering.
  • We can build server-side applications using Node.js.
  • Furthermore, we can create real-time applications using Node.js.

Some of the prominent applications of Node.js have been seen on Netflix, Yahoo, Uber, LinkedIn, eBay, and Paypal.

How to Start Using Node.js?

In order to start working with Node.js, first of all, you need to download it from its official site and install it. Once it is installed, you can test it by printing its version by using the following command.

node -v
NodeJS Installation

Some Basic Examples of NodeJS

The following code shows how to display a text message on the console. You need to create a file with .js extension. Let us name this file welcome.js.

console.log("Welcome to the Programmingempire.com");

In order to run the above code, we use the following command.

Displaying Text on Console with NodeJS
Displaying Text on Console with NodeJS

Since NodeJS requires JavaScript as the language for programming, it is very easy to work with if you already know JavaScript. As a matter of fact, in a NodeJS program, you can use JavaScript variables, data types, objects, functions, and other constructs. A simple NodeJS program is given below.

Find the Area of a Circle Using NodeJS

So, this is how you can write simple programs in NodeJS. However, we use NodeJS for server-side programming. So, let us write a simple program to create a server in NodeJS.

Creating a Server in NodeJS


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