FACTDOUBLE

  • Updated

Returns the double factorial of the given number.

Sample Usage

FACTDOUBLE(5)
FACTDOUBLE(C5)

Syntax

FACTDOUBLE(number)

  • number - The number for which the double factorial is to be computed.

Examples

FACTDOUBLE(5) returns the number 15.
FACTDOUBLE(C5) returns the double factorial of the number contained in C5.

Notes

  • Decimal inputs will be truncated. 
  • If is number is odd, double factorial is calculated as follows: 
    • n!! = n*(n-2)*(n-4)...(3)(1)
  • If is number is even, double factorial is calculated as follows: 
    • n!! = n*(n-2)*(n-4)...(4)(2)