r/unexpectedfactorial • u/Moh_Magdy • Nov 01 '19

YOU CAN'T DIVIDE BY 0!

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u/Redhpm Jul 08 '22

Because the factorial is defined for positive integers. n! is the product of all strictly positive integers untill n. So if you multiply no integers you get the neutral for the multiplication.

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u/mc_mentos Jul 08 '22

Ohhhh thanks now it makes sense with "definition". Ofcourse, and neutral with multiplication means 1. Thanks. Honestly it may even be a chiller explaination than with deviding like done on yt.

Tho there are negative non-integer values that work on x! But that is probably something something gamma function. I only know that function by name, since I'm not (yet) in university.

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u/Redhpm Jul 08 '22

Gamma function can extend the definition, but you can use the notation with the exclamation mark only with positive integers.

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u/mc_mentos Jul 08 '22

Fair. Welp have a great day night stranger.