| 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 type is 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
| ||
Examples
FP_CLASS (4.0_8) has the value 4 (FOR_K_FP_POS_NORM).