# Function gamma Compute the gamma function of a value using Lanczos approximation for small values, and an extended Stirling approximation for large values. For matrices, the function is evaluated element wise. ## Syntax ```js math.gamma(n) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `n` | number | Array | Matrix | A real or complex number ### Returns Type | Description ---- | ----------- number | Array | Matrix | The gamma of `n` ## Examples ```js math.gamma(5) // returns 24 math.gamma(-0.5) // returns -3.5449077018110335 math.gamma(math.i) // returns -0.15494982830180973 - 0.49801566811835596i ``` ## See also [combinations](combinations.md), [factorial](factorial.md), [permutations](permutations.md)