GAMMA — Gamma function#
-
GAMMA(X)#
GAMMA(X)
computes Gamma (Gamma) ofX
. For positive, integer values ofX
the Gamma function simplifies to the factorial function Gamma(x)=(x-1)!.- 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 = GAMMA(X)
- Example:
program test_gamma real :: x = 1.0 x = gamma(x) ! returns 1.0 end program test_gamma
- Specific names:
Name
Argument
Return type
Standard
DGAMMA(X)
REAL(8) X
REAL(8)
GNU extension
- See also:
Logarithm of the Gamma function: LOG_GAMMA — Logarithm of the Gamma function