You learned the two parts every recursive function needs: a base case that stops the recursion, and a recursive case that breaks problems into smaller versions.
You implemented classic algorithms: factorial, Fibonacci, sum of digits, string reversal, and binary search. You practiced recognizing when recursion fits naturally and when loops work better.
Core takeaways:
Always define a base case first
Recursive calls must progress toward the base case
Trust the recursion. Don't trace every call mentally
Python limits recursion depth. Use loops for deep problems