FP_CLASS (X)

9.3.53 FP_CLASS (X)

Description:	Returns the class of an IEEE real (S_floating, T_floating, or X_floating) argument. On OpenVMS systems, the compiler option specifying IEEE floating format must be set.
Class:	Elemental function; Generic
Arguments:	X must be of type real.
Results:	The result is of type default integer. The return value is one of the following: `Class of Argument Return Value Signaling NaN FOR_K_FP_SNAN Quiet NaN FOR_K_FP_QNAN Positive Infinity FOR_K_FP_POS_INF Negative Infinity FOR_K_FP_NEG_INF Positive Normalized Number FOR_K_FP_POS_NORM Negative Normalized Number FOR_K_FP_NEG_NORM Positive Denormalized Number FOR_K_FP_POS_DENORM Negative Denormalized Number FOR_K_FP_NEG_DENORM Positive Zero FOR_K_FP_POS_ZERO Negative Zero FOR_K_FP_NEG_ZERO` The preceding return values are defined in file `fordef.f` on Tru64 UNIX and Linux systems, module FORSYSDEF on OpenVMS systems, and file `fordef.for` on Windows systems. For information on the location of these files, see your user manual or programmer's guide.

Examples

FP_CLASS (4.0_8) has the value 4 (FOR_K_FP_POS_NORM).