Logical Functions Logical Functions The following table lists the functions that return Boolean values. These functions require no arguments and essentially operate as system constants. Logical Functions eV+Language User's Guide, v2.x, 18318-000 Rev A Page 87 Keyword Function FALSE Return the value used by eV+ to represent a logical false result. OFF Return the value used by eV+ to represent a logical false result. ON Return the value used by eV+ to represent a logical true result. TRUE Return the value used by eV+ to represent a logical true result.