ISATTY — Whether a unit is a terminal device#

ISATTY(UNIT)#

Determine whether a unit is connected to a terminal device.

Parameters: UNIT – Shall be a scalar INTEGER.
Returns: Returns .TRUE. if the UNIT is connected to a terminal device, .FALSE. otherwise.

Standard:

GNU extension

Class:

Function

Syntax:

RESULT = ISATTY(UNIT)

Example:

PROGRAM test_isatty
  INTEGER(kind=1) :: unit
  DO unit = 1, 10
    write(*,*) isatty(unit=unit)
  END DO
END PROGRAM