DriveWorks Pro 15: FactDouble [send feedback...]

FactDouble

This function, when calculated, returns the double factorial of the specified number.

Syntax

FACTDOUBLE( [ Number] )

Number is the number or the reference to a number, that you want to find the double factorial of.

Examples

Rule

Meaning
FACTDOUBLE(6)If the specified number is odd, the FACTDOUBLE function will begin its multiplication at 1, and will cycle through the numbers between 1 and 6, in increments of 2, multiplying them together. If the specified number is even, the FACTDOUBLE function will begin its multiplication at 2, and will cycle through the numbers between 1 and 6, in increments of 2, multiplying them together. For this example 6 is even so the FACTDOUBLE function will perform the following calculation:
2*4*6

Example Outcomes

Number

Calculation Breakdown

Result of the FACTDOUBLE function

51*3*515
122*4*6*8*10*1246080
171*3*5*7*9*11*13*15*1734459425

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