def factorial(n):
    if n == 1:
        return 1
    else:  # Works without else too...
        return n * factorial(n-1)

# Alternative
def factorial(n):
    if n == 1:
        return 1
    return n * factorial(n-1)

# Don't do it this way
def bad_factorial(n):
    print(n)
    return n * bad_factorial(n-1)
    if n == 1:
        return 1