Answer / Deepak Kumar Gupta

Function groups in SAP ABAP are a collection of related function modules that share the same data area. They allow easy access to a set of functions with similar purposes, improving program structure and readability. Function modules, on the other hand, are self-contained programs that perform specific tasks, usually without interaction with users or the screen.nnHere's an example for function group declaration:

```abap
FUNCTION-GROUP ZMY_FUNCTION_GROUP.
FUNCTIONS:
MY_FM1 EXPORTING iv_param1 TYPE i,
iv_param2 TYPE s LENGTH 40
IMPORTING ps_result TYPE standard table.
ENDFG.
```nnAnd here's an example for function module declaration:

```abap
FUNCTION MY_FM2.
DATA: lt_results TYPE standard table,
iv_param1 TYPE i,
iv_param2 TYPE s LENGTH 40.
...
ENDFUNCTION.
```

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