Da Vinci
Da Vinci
Branch Unspecified
26 Aug 2015

Why is 0! = 1 ?

Why is 0! = 1 ?
26 Aug 2015
Da Vinci
Why is 0! = 1 ?
Short answer: It's been 'defined' that way to make sense, and fit into general scheme of things.
Anoop Kumar

Anoop Kumar

Branch Unspecified
26 Aug 2015
Factorial by definition is how many number of ways you can arrange n, Natural numbers of things.
2! = {1,2}, {2,1} -> 2
1! = {1} -> 1
0! = {} -> 1

Here is several explanation in this video
Da Vinci

Da Vinci

Branch Unspecified
27 Aug 2015
Thanks for the reply 😀 ...

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