The SAP / ABAP varying command is a function of the DO loop which allows you to move horizontaly along a table row without actually having to specify each individual field name. i.e. if the table row had the fields: Field1 Field2 Field3 Field4 etc you would be able to loop around each field using only one DO..VARYING command.
*Code to demonstrate VARYING command * The varying comand works on the position within the row, therfore * each field must be the same number of fields apart. DATA: ld_p0121 type p0121-rfp01, ld_numcont type i. DO 21 TIMES VARYING ld_p0121 FROM p0121-RFP01 NEXT p0121-RFP02. IF not ld_p0121 IS INITIAL. ld_numcont = ld_numcont + 1. ENDIF. ENDDO.
*Code to demonstrate multiple field VARYING command DATA: ld_kst0x LIKE p0027-kst02, ld_auf0x LIKE p0027-auf02, ld_psp0x LIKE p0027-psp02. DO 25 TIMES VARYING ld_kst0x FROM p0027-kst02 NEXT p0027-kst03 VARYING ld_auf0x FROM p0027-auf02 NEXT p0027-auf03 VARYING ld_psp0x FROM p0027-psp02 NEXT p0027-psp03. PERFORM get_cost_center_and_text USING ld_kst0x ld_auf0x ld_psp0x. APPEND output_tab. ENDDO.