The ! Command
Calculates the factorial of a number or list.
value!
Press:
- MATH to access the math menu.
- LEFT to access the PRB submenu.
- 4 to select !, or use arrows.
TI-83/84/+/SE
1 byte
! is the factorial function, where n! = n*(n-1)! and 0! = 1, n an nonnegative integer. The function also works for arguments that are half an odd integer and greater than -1/2: $(-\frac1{2})!$ is defined as $\sqrt{\pi}$ and the rest are defined recursively. 69 is the largest number for which the calculator can perform the operation.
3!
6
(‾.5)!
1.772453851
Ans²
3.141592654
The combinatorial interpretation of factorials is the number of ways to arrange n objects in order.
Error Conditions
- ERR:DOMAIN for any numbers except the ones mentioned above.
Related Commands
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