Defining and Calling Python Functions

You'll also learn the various ways to pass data into a function when calling it, which allows for different behavior from one invocation to the next.
In this course, you'll learn:
How functions work in Python and why they're beneficial
How to define and call your own Python function
Mechanisms for passing arguments to your function
Some differences between how to work with functions in Python vs C++
How to return data from your function back to the calling environment
This course will be the most helpful for you if you're already familiar with the fundamental concepts of Python, including basic data types, lists and tuples, dictionaries, the import statement, conditional statements, and for loops.
Homepage

https://realpython.com/courses/defining-and-calling-functions/