Summary
This function calculates the double factorial of the specified number.
Syntax
FACTDOUBLE(number)
Arguments
The argument can be any non-negative numeric value.
Remarks
The number argument must be a non-negative number. If you provide a number that is not an integer for the number argument, the decimal portion of the number is ignored. The double factorial is calculated as follows for even numbers:
n!! = n(n-2)(n-4) ... (4)(2)
The double factorial is calculated as follows for odd numbers:
n!! = n(n-2)(n-4) ... (3)(1)
Data Types
Accepts numeric data. Returns numeric data.
Examples
FACTDOUBLE(E3)
FACTDOUBLE(R3C5)
FACTDOUBLE(6) gives the result 48
Version Available
This function is available in product version 1.0 or later.