Factorials

🎯 Calculate the factorial of a number (n!):

1 * 2 * 3 * 4 ... * 10

def factorial(n):
    """Returns a factorial of n."""
    pass


# Test code
assert factorial(0) == 1
assert factorial(1) == 1
assert factorial(2) == 2
assert factorial(3) == 6
assert factorial(7) == 5040

Extra Challenges

• implement the program as a recursive function

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