How to Use GitHub Copilot to Write Your First Algorithm in 2026

If you’re a coding newbie, the thought of writing your first algorithm can feel overwhelming. Maybe you've tried coding before but hit a wall, or perhaps you're just diving into programming for the first time. The good news? GitHub Copilot can be a powerful ally in this journey. In just about an hour, you can leverage Copilot to help you craft your very first algorithm with minimal fuss.

Time Estimate: 1 Hour

You can finish this in about one hour if you follow the steps closely and have everything set up beforehand.

Prerequisites

1. GitHub Account: You’ll need a GitHub account to access Copilot.
2. Visual Studio Code: Install VS Code as your code editor.
3. GitHub Copilot Subscription: Copilot costs $10/month for individuals, which is worth it for the productivity boost it offers.

Step-by-Step Guide to Writing Your First Algorithm

Step 1: Set Up Your Environment

1. Install VS Code: Download and install Visual Studio Code from here.
2. Install GitHub Copilot Extension: Open VS Code, go to Extensions (Ctrl+Shift+X), and search for "GitHub Copilot." Click "Install."
3. Sign In to GitHub: Once installed, you'll be prompted to sign in to your GitHub account. Follow the instructions to authenticate.

Step 2: Create a New File

1. Open a New File: In VS Code, create a new file with a .js or .py extension, depending on your preferred programming language.
2. Write a Comment: Start with a comment describing what you want to do. For example, type // Write a function to find the maximum number in an array or # Function to find the maximum number in a list.

Step 3: Let Copilot Work Its Magic

1. Trigger Copilot: After writing the comment, hit Enter. Copilot will automatically suggest a function.
2. Review and Accept: If you like the suggestion, press Tab to accept it. If it’s not quite right, you can keep typing or ask for another suggestion by pressing Ctrl+Space.

Step 4: Test Your Algorithm

1. Add Test Cases: Below the function, write a few test cases to see if your function works as expected. For example:

   console.log(findMax([1, 3, 2])); // should return 3
   console.log(findMax([-1, -3, -2])); // should return -1
   

2. Run the Code: Use the terminal in VS Code to run your code and check the output.

Step 5: Troubleshooting

• Common Issues: If the function doesn't return the expected output, double-check the logic in the algorithm. You can ask Copilot for help by modifying your comment or writing a new one.
• What Could Go Wrong: Sometimes, Copilot may suggest incomplete or incorrect code. Always test and validate the suggestions.

What’s Next?

Once you’ve successfully written your first algorithm, consider exploring more complex algorithms, such as sorting or searching algorithms. You can also dive into data structures like arrays and linked lists.

Additional Resources

• GitHub Copilot Documentation: To get the most out of Copilot, check the official documentation.
• Built This Week Podcast: For more coding tips and tools, listen to our episodes where we share insights on building with GitHub Copilot and other tools.

Conclusion: Get Started with GitHub Copilot

If you're ready to tackle your first algorithm, start by following the steps above. GitHub Copilot can significantly reduce the friction of coding for beginners.

Recommendation: Sign up for GitHub Copilot, set up your environment, and write your first algorithm today.