fx-82MS fx-82TL fx-9860GII TI-83
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.