compute pi - python

def compute_pi(n):
    denom = 1
    toggle = 1
    result = 0

    for x in range(n, 0, -1):
        result += toggle * (1 / denom)
        denom += 2
        toggle *= -1

    result *= 4

    return result

print("Pi: ", compute_pi(int(input("Enter n for pi:"))))