Node.js – Creating Your First Program | Node.js Tutorial

📌 How to Run JavaScript Code in Node.js

Once you have installed Node.js successfully, it's time to write and run your first JavaScript program. In this tutorial, you'll learn 4 different ways to run JavaScript code:

📋 Ways to Run JavaScript

Using an Online Compiler
Using the Terminal (Command Prompt)
Using a Web Browser
Using Visual Studio Code (VS Code)

Node.js Environment

RUNTIME ACTIVE

console.log("Hello, Node.js!");
console.log("This is your first Node.js program running in the terminal.");

Terminal Output

Live Output Preview

📌 Example: First JavaScript Program

Let’s start with a simple program in Node.js:

console.log("Hello, Node.js!");

This program will print:

Hello, Node.js!

✅ 1. Run JavaScript Using an Online Compiler

If you don’t want to install anything, you can use an online compiler.
Popular online compilers:
JSFiddle
CodeSandbox
Replit
👉 Just paste the code and click Run.

✅ 2. Run JavaScript in the Terminal (Node.js)

After installing Node.js:

Open Command Prompt (Windows) or Terminal (Mac/Linux).
Create a new file named index.js.
Add the following code:

✅ 3. Run JavaScript in the Web Browser

Since JavaScript was originally made for browsers, you can still run it there.

Create an HTML file and add JavaScript inside the <script> tag.

✅ 4. Run JavaScript in Visual Studio Code (VS Code)

VS Code is the most popular editor for Node.js development.

Open VS Code.
Create a file index.js.
Write the following code:

nodejs

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