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

    $n!! = n\left ( n-2 \right )\left ( n-4 \right )...\left ( 4 \right )\left ( 2 \right )$, if number is even

    $n!! = n\left ( n-2 \right )\left ( n-4 \right )...\left ( 3 \right )\left ( 1 \right )$, 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

FACTDOUBLE Function
advanced_excel_math_trigonometric_functions.htm
Advertisements