Calculating factorial

[Marcin 'Qrczak' Kowalczyk]

Wed, 06 Dec 2000 16:11:11 GMT, Tim Hochberg <tim.hochberg at ieee.org> pisze:

> def factorial(n):
>     result = 1L
>     while n:
>         result *= n
>         n -= 1
>     return result
> 
> It's not any faster than the other choices, but it has the dubious,
> theoretical distinction of using less memory than all but the xrange version

OTOH counting upwards lets it work on smaller numbers on average.

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