| Subscript is no of occurrences of an array. |
An index is the number of displacement positions of an array. |
| Subscript should declare separately with S9(04) COMP in WORKING-STORAGE SECTION. |
The index doesn't require a separate declaration. INDEX BY phrase used to declare it along with table declaration. |
| Subscript is slow in accessing table data. |
The index is faster in accessing table data. |
| Subscript can initialize by using MOVE statement. |
An index should be initialized by using the SET statement. |
| Subscript can increase by an ADD statement and decrease by using the SUBTRACT statement. |
An index can increased and decreased by using the SET statement. |
