MoreMathExpMinusOne Method

public static double ExpMinusOne(
	double x
)

Public Shared Function ExpMinusOne ( 
	x As Double
) As Double

public:
static double ExpMinusOne(
	double x
)

static member ExpMinusOne : 
        x : float -> float 

Parameters

x  Double

The argument.

Return Value

If x is close to 0, then e^x is close to 1, and computing e^x-1 by Math.Exp(x) - 1.0 will be subject to severe loss of significance due to cancelation. This method maintains full precision for all values of x by switching to a series expansion when x is near zero.

Reference