ABAP Keyword Documentation →  ABAP - Reference →  Declarations →  Declaration Statements →  Classes and Interfaces →  ABAP Objects - Overview →  Classes →  Components of Classes →  Methods of Classes 

Interface Parameters in Methods

Interface parameters in methods are input parameters (IMPORTING, CHANGING parameters) and output parameters (EXPORTING, CHANGING, RETURNING parameters). In declarations with the statements

• METHODS

• CLASS-METHODS

• EVENTS

• CLASS-EVENTS

the following attributes are determined:

Other versions: 7.31 | 7.40 | 7.54

Passing parameters by reference or by value

VALUE(p)REFERENCE(p)

Typing parameters

TYPELIKETYPE

Optional parameters

All input parameters (IMPORTING, CHANGING parameters) can be defined in the declaration as optional parameters using the additions OPTIONAL or DEFAULT. These parameters must not necessarily be transfered when the method is called. With the addition OPTIONAL your parameter remains initialized according to type, while the addition DEFAULT allows you to enter a start value.