ABAP Keyword Documentation → ABAP − Reference → Program Layout → Modularization Statements → Procedures
Function Modules
Function modules are cross-program reusable procedures that are organized into function groups and whose functions are implemented between the following statements:
FUNCTION
...
ENDFUNCTION
Function modules and their interfaces are created in Function Builder in ABAP Workbench or in the ABAP Development Tools (ADT).
Other versions: 7.31 | 7.40 | 7.54
Note
Function modules in function groups are the predecessor technology of public methods in global classes.