Reference > Methods lnGamma(x)¶ Definition¶ Double lnGamma(Number x) Description¶ Returns the natural logarithm of the Gamma function applied to x. Parameter Definition¶ Name Type Description x Number Input value Examples¶ 1 2 3Double r1 = lnGamma(3.5D); // r1 == 1.2009736023362918 Double r2 = lnGamma(-50.3D); // r2 == NaN Double r3 = lnGamma(777); // r3 == 4391.868477843784