explain how it works?

Question

def fib(x):
if x==0 or x==1:
return 1
else:
return fib(x-1) + fib(x-2)
print(fib(5))

Answer 1

https://realpython.com/fibonacci-sequence-JUMP_LINK__&&__python__&&__JUMP_LINK/

Answer 2

No one can explain to you- like riding your bicycle .... take a sheet of paper and a pencil and go step by step.

Answer 3

a similar situation is considered in this matter

https://www.sololearn.com/Discuss/3072593/?ref=app