Why does the process do it in the form of a loop if there is no while or for?

Question

def fib(x):
if x == 0 or x == 1:
return 1
else:
return fib(x-1) + fib(x-2)
print(fib(4))

Answer 1

The keyword is "recursion".
Have a look at lesson 68 of the Python Core course again.

Answer 2

You better search for recursive tutorial on the web, it is not a easy topic and Sololearn could not explain this concept very deeply.