System Methods

Just as traditional APL interpreters have system variables and system functions (whose names all begin with the ⎕ character), system methods are pre-defined methods (also with names beginning with ⎕) which apply to internal user-defined object classes, and in most cases to external classes as well.

You can call a system method exactly as you would call an ordinary method of a class, either using dot notation (for example MyPoint.⎕CLASSNAME), or (within a user-defined class method) by simply using the system method's name such as ⎕CLASSNAME (equivalent to ⎕THIS.⎕CLASSNAME).

System methods can be niladic, monadic or dyadic.

See the reference section on System Methods for a full list.