How to Run JavaScript: A Beginner’s Guide

Hello, future coders! Today, we’re going to learn about running JavaScript. As you embark on your coding journey, understanding how to run your code is just as important as learning how to write it. So, let’s get started!

Running JavaScript in a Browser

One of the most common ways to run JavaScript is in a web browser. There are two main ways to do this:

1. Including an External Script File: You can write your JavaScript code in a separate file (with a .js extension) and then include this file in your HTML page using the <script> tag. Here’s how you do it:

<script src="your-file.js"></script>

2. Writing JavaScript Directly in HTML: You can also write your JavaScript code directly within your HTML page. Again, you use the <script> tag, but this time, you write your code between the opening and closing tags, like so:

<script>
  // Your JavaScript code goes here
</script>

Running JavaScript in the Browser Console

Another way to run JavaScript is by using the browser console. This is a great way to test small snippets of code. To do this, simply open your browser’s developer tools (usually by pressing F12), navigate to the console, write your code, and press Enter.

Using REPL

REPL stands for Read-Eval-Print Loop. It’s a simple, interactive programming environment that takes single user inputs, executes them, and returns the result to the user. JavaScript REPL environments can be found online, and they’re a great way to practice your JavaScript skills.

Conclusion

Running JavaScript is straightforward once you know how. Whether you’re writing a full-fledged web application or just testing a small piece of code, there’s a method that’s right for you. So go ahead, start coding, and see your JavaScript come to life!

Happy coding, students! Welcome to the exciting world of JavaScript.