mathjs/docs/reference/functions/gamma.md

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

math.gamma(n)

Parameters

Parameter	Type	Description
n	Number | Array | Matrix | Boolean | null	An integer number

Returns

Type	Description
Number | Array | Matrix	The gamma of n

Examples

math.gamma(5);       // returns 24
math.gamma(-0.5);    // returns -3.5449077018110335
math.gamma(math.i);  // returns -0.15494982830180973 - 0.49801566811835596i

See also

combinations, factorial, permutations