fibonacci series for loop python

1# WARNING: this program assumes the
2# fibonacci sequence starts at 1
3def fib(num):
4	"""return the number at index `num` in the fibonacci sequence"""
5    if num <= 2:
6        return 1
7    return fib(num - 1) + fib(num - 2)
8
9# method 2: use `for` loop
10def fib2(num):
11	a, b = 1, 1
12	for _ in range(num - 1):
13		a, b = b, a + b
14	return a
15
16
17print(fib(6))  # 8
18print(fib2(6))  # same result, but much faster

1# Program to display the Fibonacci sequence up to n-th term
2
3nterms = int(input("How many terms? "))
4
5# first two terms
6n1, n2 = 0, 1
7count = 0
8
9# check if the number of terms is valid
10if nterms <= 0:
11   print("Please enter a positive integer")
12elif nterms == 1:
13   print("Fibonacci sequence upto",nterms,":")
14   print(n1)
15else:
16   print("Fibonacci sequence:")
17   while count < nterms:
18       print(n1)
19       nth = n1 + n2
20       # update values
21       n1 = n2
22       n2 = nth
23       count += 1