Can any one explain me the diff between call by value and call by reference in Subroutines.
ex :
PERFORM ADD_Z1CLASS1 USING LW_MARA-MATNR
CHANGING IDOC_DATA[].
FORM ADD_Z1CLASS1 USING PV_MATNR TYPE MATNR
CHANGING PT_EDIDD TYPE EDIDD_TT.
Please let me know, if the above code is call by value or call by reference...?
Any suggestions will be appreciated!
Regards,
Kittu