AdvancedIntegerMathDoubleFactorial Method

public static double DoubleFactorial(
	int n
)

Public Shared Function DoubleFactorial ( 
	n As Integer
) As Double

public:
static double DoubleFactorial(
	int n
)

static member DoubleFactorial : 
        n : int -> float 

Parameters

n  Int32

The argument, which must be positive.

Return Value

The double factorial of an integer is the product all integers of the same parity, up to and including the integer. Thus 5! = 5 * 3 * 1 = 15 and 6! = 6 * 4 * 2 = 48.

Reference

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