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Function `std.mathspecial.gamma`

The Gamma function, Γ(x)


						
				real gamma(
				
  real x
				

				) pure nothrow @nogc @safe;

Γ(x) is a generalisation of the factorial function to real and complex numbers. Like x!, Γ(x+1) = x * Γ(x).

Mathematically, if z.re > 0 then Γ(z) = ∫₀^∞ t^z-1e^-t dt

Special Values
x	Γ(x)
NAN	NAN
±0.0	±∞
integer > 0	(x-1)!
integer < 0	NAN
+∞	+∞
-∞	NAN

Authors

Stephen L. Moshier (original C code). Conversion to D by Don Clugston

License

Boost License 1.0.

API Documentation

Function std.mathspecial.gamma

Authors

License

Function `std.mathspecial.gamma`