LGAMMA Section: Linux Programmer's Manual (3) Updated: June 25, 2025 Index   NAME lgamma - log gamma function   SYNOPSIS #include <math.h> double lgamma(double x);   DESCRIPTION The lgamma() function returns the log of the absolute value of the Gamma function. The sign of the Gamma function is returned in the external integer signgam. For negative integer values of x, lgamma() returns HUGE_VAL and errno is set to ERANGE.   ERRORS ERANGE Invalid argument - negative integer value of x.   CONFORMING TO SVID 3, BSD 4.3   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION ERRORS CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:04 GMT, March 24, 2025