|AdvancedMathGamma Method (Double)|
public static double Gamma( double x )
Public Shared Function Gamma ( x As Double ) As Double
public: static double Gamma( double x )
static member Gamma : x : float -> float
The Gamma function is a generalization of the factorial (see Factorial(Int32)) to arbitrary real values.
For positive integer arguments, this integral evaluates to Γ(n+1)=n!, but it can also be evaluated for non-integer z.
To evaluate the Gamma function for a complex argument, use Gamma(Complex).
The function is defined for all x. It has poles at all negative integers and at zero; the method returns NaN for these arguments. For positive arguments, the value of the function increases rapidly with increasing argument. For values of x greater than about 170, the value of the function exceeds MaxValue; for these arguments the method returns PositiveInfinity. The method is accurate to full precision over its entire domain.