Intel® Fortran Compiler 17.0 Developer Guide and Reference
Elemental Intrinsic Function (Specific): Converts the real part of a double complex argument to double-precision type. This is a specific function that has no generic function associated with it. It cannot be passed as an actual argument.
result = DREAL (a)
a |
(Input) Must be of type double complex (COMPLEX(8) or COMPLEX*16). |
The result type is double precision real (REAL(8) or REAL*8).
DREAL ((2.0d0, 3.0d0)) has the value 2.0d0.