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What is the difference between subscript and index?

Question Posted / vikram kapoor


What is the difference between subscript and index?..

Answer / robertd903

Subscripts are programmer-defined variables, of numeric type--used to reference an array.
Example:
77 WS-SUB PIC 9(04) COMP.
01 WS-TABLE.
05 WS-TABLE-ENTRY OCCURS 5 Times PIC X(80).

In PROCEDURE DIVISION:
MOVE WS-TABLE-ENTRY(WS-SUB) TO...

Indexes are defined by the programmer, but the PICTURE clause is omitted.
Example:
01 WS-TABLE.
05 WS-TABLE-ENTRY OCCURS 5 TIMES INDEXED BY WS-IDX.
10 FILLER PIC X(80).

In PROCEDURE DIVISION:
MOVE WS-TABLE-ENTRY(WS-IDX) TO...

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