type Boolean = (False, True); { built-in type }
The intrinsic Boolean represents boolean values, i.e. it can only assume the two values True and False (which are predefined constants).
Boolean is defined in ISO 7185 Pascal and supported by all known Pascal variants.
program BooleanDemo; var a: Boolean; begin a := True; WriteLn (a) end.
Boolean (Intrinsic), True, False, CBoolean, ByteBool, ShortBool, MedBool, WordBool, LongBool, LongestBool.