SAP ABAP DECLARATIONS documentation, setup help and example usage

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Declaration Statements
This section describes the declaration statements (or declarative statements) for

data types and data objects ,

the statements for defining

classes and interfaces as well as their components,

the statement for declaring

field symbols

The statements PARAMETERS and SELECT OPTIONS for declaring input fields in selection screens are also declarative statements, but are executed separately in the respective sections.

Note
Alongside the explicit ways of declaring data objects described here, there are also statements and additions that declare data objects implicitly, such as
SELECTION-SCREEN COMMENT . However, most of these statements are obsolete (for example SUMMING ).