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Why is 0! Equal to 1? Can anyone can help to understand ? Please explain with discription

user55439
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1 Answers1

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Let's start from $5! = 5*4*3*2*1$

Now if we go down one number to $4!$ essentially we divide $5!$ by $5.$

Following that logic going down to $3!$ we divide $4!$ by 4 keep doing this till $1!$. So to get $0!$ all we do is divide $1!$ by $1$

Luke Xu
  • 325