Functions

Learn to write reusable blocks of code that make your programs organized, efficient, and easier to understand.

9 lessons

What Is a Function?

Functions are reusable blocks of code with names, letting you organize programs and avoid repetition.

Learn the syntax for creating your own functions and executing them when needed.

Make functions flexible by accepting inputs that customize their behavior each time they're called.

Learn how functions can produce results that you capture and use elsewhere in your code.

Understand where variables exist and why they can't always be accessed from everywhere in your code.

Learn the difference between functions that only calculate values and those that change the world around them.

Good function names make code readable and self-documenting — learn conventions that help.

Let AI write utility functions for common tasks, then review and integrate them into your code.

Learn to organize your code by grouping related functions into separate files and importing them where needed.

Share your wins, ask questions, and help other builders in the Codistry Academy community.