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Subroutines  Locate the document in its SAP Library structure

Subroutines are procedures that you can define in any ABAP program and also call from any program. Subroutines are normally called internally, that is, they contain sections of code or algorithms that are used frequently locally. If you want a function to be reusable throughout the system, use a function module.

Defining Subroutines

Calling Subroutines