Beginner · Lesson 7 of 12
Your first function
A function packages a useful operation under a name. Parameters supply input, and a return value carries the result back to the caller. Keep printing separate from calculation so you can reuse and test the function.
Try it for yourself
Run the example, then change one thing and see what happens.
main.pyYour ideas, in code.
Loading your editor…
Run your code to see the output here.
Ready to buildUTF-84 lines
Expected output
14
Make it your own
Write a function that doubles its input.
A quick check
Which habit helps when learning your first function?