LOG_GAMMA — Logarithm of the Gamma function#
-
LOG_GAMMA(X)#
LOG_GAMMA(X)
computes the natural logarithm of the absolute value of the Gamma (Gamma) function.- Parameters
X – Shall be of type
REAL
and neither zero nor a negative integer.- Returns
The return value is of type
REAL
of the same kind asX
.
- Standard:
Fortran 2008 and later
- Class:
Elemental function
- Syntax:
X = LOG_GAMMA(X)
- Example:
program test_log_gamma real :: x = 1.0 x = lgamma(x) ! returns 0.0 end program test_log_gamma
- Specific names:
Name
Argument
Return type
Standard
LGAMMA(X)
REAL(4) X
REAL(4)
GNU extension
ALGAMA(X)
REAL(4) X
REAL(4)
GNU extension
DLGAMA(X)
REAL(8) X
REAL(8)
GNU extension
- See also:
Gamma function: GAMMA