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Factorial

On a Casio calculator you can calculate the factorial of a natural number

x!
       x-1

 


Example 1

To calculate 4! = 24

x!
 4         x-1 =  4!
          24.

 


Example 2

To enter 0!

x!
 0         x-1 =  0!
           1.

This is correct, because by definition is specified that 0! ≝ 1.

 


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