What is the value of 0!?

25 Answers

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  • 9 months ago

    5! = 1*2*3*4*5

    therefore

    4! = 5! / 5 = 1*2*3*4 (the 5 cancels out)

    therefore

    3! = 4!/4

    2! = 3!/3

    1! = 2! / 2 = 1

    therefore

    0! = 1! / 1 = 1/1 = 1

    It is the only way to make 0! consistent in the factorial operation.

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  • Jim
    Lv 7
    9 months ago

    We ind factorials mostly in combinations and permutations.

    To be consistent, we have defined 0! To be 1

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  • 9 months ago

    The value of 0 is equal to 0 or 1

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  • Anonymous
    9 months ago

    0! = 1 .

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  • 9 months ago

    The value of 0 is zero but it's also 1.

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  • David
    Lv 7
    9 months ago

    The value of 0! = 1

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  • 9 months ago

    The value of 0 would be 1

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  • Anonymous
    9 months ago

    The value of 0! is ****ZERO**** </shouting>

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  • 9 months ago

    1

    https://www.wolframalpha.com/input/?i=0%21

    Another way to look at it is "how many ways can you arrange "n" objects".

    If it was 3 objects, it's 6 ways.

    If 2 objects, it's 2 ways.

    If 1 object, it's 1 way.

    If 0 objects, it's 1 way.

    so 0! = 1

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  • 9 months ago

    The value of 0! is 1, according to convention.

    see link for discussion on this.

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