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tgamma(3M)							    tgamma(3M)

NAME
       tgamma(), tgammaf(), tgammal(), tgammaw(), tgammaq() - true gamma func‐
       tions

SYNOPSIS
DESCRIPTION
       The function computes the true gamma function of x.

       In contrast, the and functions compute the log of gamma.

       is a version of it takes a argument and returns a result.

       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE
       To use these functions compile either with the default option  or  with
       the and options.

       To use or compile also with the option.

       To use any of these functions, make sure your program includes and link
       in the math library by specifying on the	 compiler  or  linker  command
       line.

       For more information, see the at the following site:

RETURN VALUE
       If x and raises the divide-by-zero exception.

       If x is a negative integer, returns a NaN and raises the invalid excep‐
       tion.

       If x equals -INFINITY, returns a NaN and raises the invalid exception.

       If x equals +INFINITY, returns +INFINITY.

       If x is NaN, returns NaN.

       returns infinity (equal to in lieu of a value whose  magnitude  is  too
       large, and raises the overflow and inexact exceptions.

       raises  the  inexact exception whenever a rounded result does not equal
       the mathematical result.

ERRORS
       If x is a negative integer, sets to [EDOM].

       HP-UX functions on Integrity servers do not set by default.   For  set‐
       ting, compile with the option.

SEE ALSO
       exp(3M), lgamma(3M), log(3M), math(5).

STANDARDS CONFORMANCE
       :  ISO/IEC  C99	(including  Annex F, ``IEC 60559 floating-point arith‐
       metic'')

			   HP Integrity Server Only		    tgamma(3M)

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