FACTDOUBLE function

Category: Math and trigonometry
Introduced: Excel 2003

Summary

Returns the double factorial of a number

Syntax

FACTDOUBLE(number) The FACTDOUBLE function syntax has the following arguments:
• Number Required. The value for which to return the double factorial. If number is not an integer, it is truncated.

Example

=FACTDOUBLE(6)
=FACTDOUBLE(7)

Microsoft Support Page

https://support.microsoft.com/en-us/office/factdouble-function-e67697ac-d214-48eb-b7b7-cce2589ecac8

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