fx-82MS iPad Microsoft Windows
Factorial
On a Casio calculator you can calculate the factorial of a natural number with the keys
x-1
Example 1
To calculate 4! = 24
4 x-1 = 4!
24.
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Example 2
Enter 0!
0 x-1 = 0!
1.
This is correct, because by definition is specified that 0! ≝ 1.