You have several options for writing and running JavaScript code:

1. Browser Developer Tools (Console):

   • Every modern browser (Chrome, Firefox, Edge, Safari) comes with built-in developer tools.
   • You can open the console (usually by right-clicking on a webpage, selecting "Inspect" or "Inspect Element", and then navigating to the "Console" tab) and type JavaScript code directly to see it execute.
   • Great for quick tests and experiments.

2. Online Code Editors/Playgrounds:

   • Websites like CodePen (https://codepen.io), JSFiddle (https://jsfiddle.net), and Replit (https://replit.com) provide an online environment where you can write HTML, CSS, and JavaScript and see the results instantly without any local setup.

3. Local Development with a Text Editor and Browser:

   • Text Editor: Use a code editor like Visual Studio Code (VS Code - highly recommended), Sublime Text, or Atom to write your code.
   • HTML File: Create an HTML file (e.g., index.html).
   • Script Tag: Embed your JavaScript code within <script> tags in the HTML file, or link to an external .js file.
   • Browser: Open the HTML file in your web browser to run the JavaScript.

4. Local Development with Node.js (for server-side or command-line JS):

   • Install Node.js from https://nodejs.org.
   • This allows you to run JavaScript files directly from your terminal (e.g., node myscript.js).
   • Essential for back-end development and using many JavaScript build tools.