Give me a Clean explanation about "Recursion" with best suitable example and real time examples?

Question

Recursion

Answer 1

almost all recursive algorithms from a schoolbook:

https://code.sololearn.com/cg3DwhMKOw1E/?ref=app

Answer 2

https://www.sololearn.com/discuss/307407/?ref=app
https://www.sololearn.com/Discuss/311837/?ref=app