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Excel - FACTDOUBLE Function
Description
The FACTDOUBLE function returns the double factorial of a number.
Syntax
FACTDOUBLE (number)
Arguments
| Argument | Description | Required/Optional |
|---|---|---|
| Number | The value for which to return the double factorial. If number is not an integer, it is truncated. | Required |
Notes
-
The Double Factorial of a number, n, is
n!!=n(n−2)(n−4)...(4)(2), if number is even
n!!=n(n−2)(n−4)...(3)(1), if number is odd
If number is nonnumeric, FACTDOUBLE returns the #VALUE! error value.
If number is negative, FACTDOUBLE returns the #NUM! error value.
Applicability
Excel 2007, Excel 2010, Excel 2013, Excel 2016
Example
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