9.170. LOG_GAMMA

9.170 LOG_GAMMA — Logarithm of the Gamma function

Description:
LOG_GAMMA(X) computes the natural logarithm of the absolute value of the Gamma (\Gamma) function.
Standard:
Fortran 2008 and later
Class:
Elemental function
Syntax:
X = LOG_GAMMA(X)
Arguments:
X Shall be of type REAL and neither zero nor a negative integer.
Return value:
The return value is of type REAL of the same kind as X.
Example:
program test_log_gamma
  real :: x = 1.0
  x = lgamma(x) ! returns 0.0
end program test_log_gamma
Specific names:
Name Ar