Why is 0! = 1 ?

Why is 0! = 1 ?

Replies

  • Kaustubh Katdare
    Kaustubh Katdare
    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
    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
    Thanks for the reply 😀 ...

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