Function fibonacci

Python/5 recusrion problems.py:18–23

(n)

# 2..TO PRINT FIBONACCI SERIES

def fibonacci(n):
    assert n>=0 and int(n)==n , "only positive integers"
    if n==0 or n==1:
        return n
    else:
        return fibonacci(n-1) + fibonacci(n-2)

print(fibonacci(8))