fibonacii sequence code

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