Python program to print Fibonacci series using iteration

Write a program to print "n" terms of Fibonacci Series using Iteration. 

# Program to print "n" terms of Fibonacci Series using Iteration

num = int(input("How many terms? "))

n1, n2 = 0, 1
count = 0

if num <= 0:
    print("Please enter a positive integer")
elif num == 1:
    print("Fibonacci sequence up to", num, ":")
    print(n1)
else:
    print("Fibonacci sequence:")
    while count < num:
        print(n1)
        sum = n1 + n2
        n1 = n2
        n2 = sum
        count += 1

Output

How many terms? 10
Fibonacci sequence:
0
1
1
2
3
5
8
13
21
34