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  func­
       tion 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

       infnan(3)


Man(1) output converted with man2html