Can anyone please explain me About RECRUSSION FROM BEGGINING in C++ ?

Question

I am a 14 yr BEGGINER ...plz help me understand this..

Answer 1

take a look at faculty. 5! = 5*4*3*2*1 or formally n!= n * n-1* n-2 and so on until n-x=1. so with this you can just call a function and decrease its given value by one everytime to get the wanted result. it gets clear looking at this code:

https://code.sololearn.com/cr56IwXJRSOR/?ref=app

https://code.sololearn.com/chGgQ7jIJUIa/?ref=app