Answer / jenny

It can be done in two ways:

1.Using the INDEXED BY phrase on the OCCURS clause.

2.index can be defined(as a working storage variable) with
USAGE IS INDEX clause.

In either case the index is set, icreased or decreased
using the SET verb in the Procedure Division.

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what is the difference between external and global variables?

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Describe the difference between subscripting and indexing ?

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