On 01/-10/-28163 02:59 PM, Chris Angelico wrote:
<snip>
Sure. In my (somewhat contrived) example of factorials, that's going
to be true (apart from 0! = 0); and if the function returns a string
or other object rather than an integer, same thing. If there's the
Just to be pedantic, by any reasonable definition, 0! == one, not zero.
One reference: http://en.wikipedia.org/wiki/Factorial
3rd sentence.
More interestingly, There is a gamma function defined for lots of real
and complex numbers, which for all non-negative integers matches the
factorial:
gamma(n) = (n-1)!
The gamma function has the same value (1) for one and two, so to be
consistent, factorial should have that value for both zero and one.
DaveA
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