current = 1 # This is the current factorial
i = 1 # This is the loop counter
while current < 1000000000:
    i += 1
    current *= i
print(i-1)

# Another way:  A counting loop that stops
# continue:  Go on to the next iteration
# break:  Stop the loop
current = 1
for i in range(1, 1000):
    current *= i
    if current > 1000000000000:
        break
print(i-1)