Can someone help me to understand the below python recursion code

Question

def fun(n):

     if n<=1:

        return 1

     else:

        return fun(n-1)+func(n-2)

print(fun(5))

Answer 1

here is one function with one parameter n and u are going to call this in the print function and it loops back around till the parameter is <1 and finally when it is <=1 then it exits the recursion and prints out the 1 that is the final value.