GAMMA(3M)               COMMAND REFERENCE               GAMMA(3M)



NAME
     gamma - log gamma function

SYNOPSIS
     #include <math.h>

     double gamma (x)
     double x;

DESCRIPTION
     Gamma returns ln | (|x|)|.  The sign of  (|x|) is returned
     in the external integer signgam.

EXAMPLES
     The following C program might be used to calculate  :

          y = gamma(x);
          if (y > 88.0)
               error();
          y = exp(y);
          if(signgam)
               y = -y;

FILES
     /usr/lib/libm.a
                    Mathematical library functions.

DIAGNOSTICS
     Gamma is undefined for negative integer arguments; errno is
     set to EDOM.

SEE ALSO
     intro(3m).






















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