What is 'function module' in SAP BC-ABA - ABAP Runtime Environment?

function module - Overview

• Component: BC-ABA

• Component Name: ABAP Runtime Environment

• Description: A procedure that can only be defined in function groups and outside of classes. It can be called from all programs. A function module begins with FUNCTION and ends with ENDFUNCTION.

function module - Details

• 
  Key Concepts: 
  A function module is a reusable program that contains a set of related subroutines and functions. It is part of the ABAP Runtime Environment (BC-ABA) and is used to perform specific tasks within an SAP system. Function modules can be called from other programs, such as reports, transactions, and other function modules. 
  
  How to use it: 
  Function modules can be used to perform a variety of tasks, such as data retrieval, data manipulation, and data validation. To use a function module, you must first create it in the ABAP Workbench. Once created, you can call the function module from other programs or transactions. 
  
  Tips & Tricks: 
  When creating a function module, it is important to ensure that the parameters are correctly defined. This will ensure that the function module can be called from other programs without any errors. Additionally, it is important to document the function module so that other users can understand how to use it. 
  
  Related Information: 
  For more information on function modules, please refer to the SAP Help Portal or the ABAP Workbench documentation. Additionally, there are many online tutorials and resources available for learning more about function modules and how to use them in SAP systems.