Definicja formal parameter

Parameter of the parameter interface of a procedure. Formal parameters have names, are either generic or completely typed, and are specified as either pass by value or pass by reference. Depending on their type, they can be used like data objects in the procedure. The formal parameters of a procedure make up an important part of its signature. Formal parameters are either positional parameters (for subroutines<) or keyword parameters (for methods and function modules). When a procedure is called, formal parameters are bound to actual parameters.