ABAP Programs:Using Field Symbols for components of a structure

REPORT ZSOURCE2403.
* Table work area for later use
TABLES CUSTOMERS.
* Defining a Field Symbol
FIELD-SYMBOLS <OUTPUT>.
* Displaying all fields of all table entries
SELECT * FROM CUSTOMERS.

NEW-LINE.
DO.
ASSIGN COMPONENT SY-INDEX OF STRUCTURE CUSTOMERS TO < OUTPUT>.
IF SY-SUBRC <> 0.
EXIT.
ENDIF.
WRITE < OUTPUT>.
ENDDO.
ENDSELECT.

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