Function lgamma #
Logarithm of the gamma function for real, positive numbers and complex numbers, using Lanczos approximation for numbers and Stirling series for complex numbers.
Syntax #
math.lgamma(n)
Parameters #
| Parameter | Type | Description |
|---|---|---|
n |
number | Complex | A real or complex number |
Returns #
| Type | Description |
|---|---|
| number | Complex | The log gamma of n |
Throws #
Type | Description —- | ———–
Examples #
math.lgamma(5) // returns 3.178053830347945
math.lgamma(0) // returns Infinity
math.lgamma(-0.5) // returns NaN
math.lgamma(math.i) // returns -0.6509231993018536 - 1.8724366472624294i
