9.177. LOG_GAMMA

9.177 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
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