GAMMA(3M) GAMMA(3M)
NAME
gamma - log gamma function
SYNOPSIS
#include <math.h>
double gamma(x)
double x;
DESCRIPTION
Gamma returns ln Γ(x). The sign of Γ(x) is returned in the external
integer signgam. The following C program might be used to calculate Γ:
y = gamma(x);
if (y > 88.0)
error();
y = signgam*exp(y);
DIAGNOSTICS
A huge value is returned for negative integer arguments.
BUGS
There should be a positive indication of error.
GAMMA(3M)