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Imag(Z)
Imag: REAL function, the `KIND=' value of the type being that of argument Z.
Z: COMPLEX; scalar; INTENT(IN).
Intrinsic groups: f2c.
Description:
The imaginary part of Z is returned, without conversion.
Note: The way to do this in standard Fortran 90
is `AIMAG(Z)'.
However, when, for example, Z is DOUBLE COMPLEX,
`AIMAG(Z)' means something different for some compilers
that are not true Fortran 90 compilers but offer some
extensions standardized by Fortran 90 (such as the
DOUBLE COMPLEX type, also known as COMPLEX(KIND=2)).
The advantage of IMAG() is that, while not necessarily
more or less portable than AIMAG(), it is more likely to
cause a compiler that doesn't support it to produce a diagnostic
than generate incorrect code.
See REAL() and AIMAG() of Complex, for more information.