Intel® Fortran Compiler 18.0 Developer Guide and Reference
Portability Function: Checks whether a logical unit number is a terminal.
USE IFPORT
result = ISATTY (lunit)
iunit |
(Input) INTEGER(4). An integer expression corresponding to a Fortran logical unit number. Must be in the range 0 to 100 and must be connected. |
The result type is LOGICAL(4). The result is .TRUE. if the specified logical unit is connected to a terminal device; otherwise, .FALSE..
If lunit is out of range or is not connected, zero is returned.