Factorial of a large number in python

Question

Here\'s my approach to factorials:

def factorial(n):
    \'\'\'Returns factorial of n\'\'\'
    r = 1
    for i in range(1, n + 1):
        r *= i
    return         


        

Answer 1

If you need a short execution time and don't need the best possible accuracy, you can use an approximation formula, e.g. Stirling approximation