In COBOL, what is the purpose of a level-number when defining group data items?
- To control the scope of the data item
- To identify the data item as a group or elementary item
- To indicate the level of nesting in the group hierarchy
- To specify the physical length of the data item
The level-number in COBOL is used to distinguish between group-level and elementary-level data items. A level-number of 01 indicates an elementary item, while higher-level numbers indicate a group item.
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