NAME

lgamma − Computes the logarithm of the gamma function

LIBRARY

Math Library (libm.a)

SYNOPSIS

#include <math.h>

double lgamma  (double x);
float  lgammaf (float  x);

DESCRIPTION

lgamma() and lgammaf() return the logarithm of the absolute value of the gamma of x, or ln(|G(x)|). The sign of the gamma of x is returned in the external integer variable signgam.  The x parameter cannot be 0 or a negative integer.