Python In Practice - 15 Projects to Master Python - Return Values from User-Defined Functions Using the Return Keyword

The video tutorial explains how to use lists and loops to access elements, and how to return values from functions using the return keyword. It demonstrates executing functions, storing results in variables, and using return to output results effectively.

What is the significance of the sum variable in the context of the function discussed?

Explain how to call a function and use its return value.