# Example: Write a function to compute the factorial of N.
# Do it with two kinds of loop.
# JMR 2019

def factorial(n):
    i = 1
    r = 1
    while i<=n:
        r = r*i
        i += 1
    return r

def factorialB(n):
    r = 1
    for i in range(1, n+1):
        r = r*i
    return r

# MAIN PROGRAM:
print(factorial(4))

print(factorialB(3))