The Excel FACT function returns the factorial of a given number. For example, =FACT(3) returns 6, equivalent to 3 x 2 x 1.
The Excel COMBIN function returns the number of combinations for a given number of items. The COMBIN function does not allow repetitions. To count combinations that allow repetitions, use the...
The Excel PERMUT function returns the number of permutations (combinations where order is significant) for a given number of items. The PERMUT function does not allow repetitions. To allow permutations with repetitions, use the...
The Excel FACTDOUBLE function returns the double factorial of a number. A double factorial is symbolized by two exclamation marks (!!).
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