Python 3: Project-based Python, Algorithms, Data Structures - O(nlog(n)) performance and algorithm prerequisites

The video tutorial explains recursion, focusing on the concept of a base case. It first demonstrates an iterative countdown timer and then develops a recursive version. The tutorial concludes with a brief introduction to the next topic, factorials, and encourages viewers to practice by visualizing function calls.

What changes need to be made to implement the recursive version of the countdown timer?

Explain the significance of returning a value in a recursive function.

What steps are involved in calling the recursive countdown function with a value of 5?