Fibonacci Series

n   => 0  1  2  3  4  5  6   7   8   9  10  11   12
F_n => 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...

OUTPUT

Enter n: 6
0 1 1 2 3 5 8

OUTPUT

Enter n: 20
0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597 2584 4181 6765

Solution

def print_fibonacci_series(n):

    before_two_time=0
    before_one_time=1
    now = before_one_time + before_two_time
    for i in range(n+1):
        if i==0:
            print(0, end=" ")
        if i==1:
            print(1, end=" ")
        if i>=2:
            print(now, end=" ")
            before_two_time = before_one_time
            before_one_time = now
            now = before_two_time +before_one_time
n=int(input("Enter n: "))
print_fibonacci_series(n)