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VLOOKUP Column Index Usage Guide

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Basic Functionality: VLOOKUP searches table array for lookup value and returns corresponding column value
Column index number determines which column to search for in table array
Formula structure: =VLOOKUP(lookup_value,table_array,column_index,FALSE)
Important Considerations: Column index must match table array column number exactly
Incorrect index number results in #REF! error
Column index can be dynamically calculated using COLUMN function
Advanced Features: MATCH function can be used to find dynamic column index
Column index can be used from different sheets or workbooks
Table array range should be locked when using same worksheet
Best Practices: VLOOKUP searches values in correct direction
Valid column index number is essential for accurate results
Range lookup should be set to FALSE for exact match