Recursion
youtube video "What on Earth is Recursion?" https://youtu.be/YZcO_jRhvxs
Example 1: A recursive forest is generated by two recursive calls using randomised input parameters in the Python/Trinket code below which is already coded and available from this link: https://trinket.io/python/dd67a6ffa2
Example 2: Recursive infix notation of one operator between two operands in Python3/Trinket code here: https://trinket.io/python3/3d8ae31bd4
with a youtube video explaining the recursion here:https://youtu.be/T-4mpxvh3OY