An index is defined with it's associated table using the INDEXED BY phrase. Itis a storage area generated by the compiler. It is a register item that exists outside the program's working storage. It is 4 bytes in length. You can’tdisplay an index. The SET statement sets up and down an index,PERFORM VARYING.
A subscript is a positive integer defined in working-storage. It's best to define it as S9(4) COMP. A subscript is changed using ADD, SUBTRACT, MOVE or PERFORM VARYING like any other numeric working storage variable.
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