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## org.apache.poi.ss.formula.functions
Class Vlookup

    java.lang.Object
      org.apache.poi.ss.formula.functions.Vlookup

All Implemented Interfaces:
  Function, Function3Arg, Function4Arg

    public final class Vlookup

extends java.lang.Object

Implementation of the VLOOKUP() function.

VLOOKUP finds a row in a lookup table by the first column value and returns the value from another column.
Syntax:
VLOOKUP(lookup_value, table_array, col_index_num, range_lookup)

lookup_value The value to be found in the first column of the table array.
table_array An area reference for the lookup data.
col_index_num a 1 based index specifying which column value of the lookup data will be returned.
range_lookup If TRUE (default), VLOOKUP finds the largest value less than or equal to the lookup_value. If FALSE, only exact matches will be considered

Constructor Summary
`Vlookup()`

Method Summary
`ValueEval` | `evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1, ValueEval arg2)` see `Function.evaluate(ValueEval[], int, int)`
`ValueEval` | `evaluate(int srcRowIndex, int srcColumnIndex, ValueEval lookup_value, ValueEval table_array, ValueEval col_index, ValueEval range_lookup)` see `Function.evaluate(ValueEval[], int, int)`
`ValueEval` | `evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Vlookup

    public Vlookup()

Method Detail

### evaluate

    public ValueEval evaluate(int srcRowIndex,
                              int srcColumnIndex,
                              ValueEval arg0,
                              ValueEval arg1,
                              ValueEval arg2)

  Description copied from interface: `Function3Arg`
  see `Function.evaluate(ValueEval[], int, int)`

### evaluate

    public ValueEval evaluate(int srcRowIndex,
                              int srcColumnIndex,
                              ValueEval lookup_value,
                              ValueEval table_array,
                              ValueEval col_index,
                              ValueEval range_lookup)

  Description copied from interface: `Function4Arg`
  see `Function.evaluate(ValueEval[], int, int)`

### evaluate

    public final ValueEval evaluate(ValueEval[] args,
                                    int srcRowIndex,
                                    int srcColumnIndex)

  Specified by:
    `evaluate` in interface `Function`
  Parameters:
    `args` - the evaluated function arguments. Empty values are represented with `BlankEval` or `MissingArgEval`, never `null`.
    `srcRowIndex` - row index of the cell containing the formula under evaluation
    `srcColumnIndex` - column index of the cell containing the formula under evaluation
  Returns:
    The evaluated result, possibly an `ErrorEval`, never `null`. Note - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to `Double.NaN` be sure to translate the result to `ErrorEval.NUM_ERROR`.

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Copyright 2017 The Apache Software Foundation or its licensors, as applicable.