# Function Reference

# _Excel_ColumnToLetter

Converts the column number to letter(s)

#include <Excel.au3>
_Excel_ColumnToLetter ( $iColumn )

## Parameters

$iColumn | The column number which you want to turn into letter(s)

## Return Value

Success: | the column letter(s).
Failure: | Empty string and sets the @error flag to non-zero.
@error: | 1 - $iColumn is not a number

## Related

_Excel_ColumnToNumber

## Example

    #include <Excel.au3>
    #include <MsgBoxConstants.au3>

    ; Translate a column number to the Excel column letter
    Local $iCol = 676
    Local $sLetter = _Excel_ColumnToLetter($iCol)
    If @error Then Exit MsgBox($MB_SYSTEMMODAL, "Excel UDF: _Excel_ColumnToLetter Example 1", "Error converting number to letter." & @CRLF & "@error = " & @error & ", @extended = " & @extended)
    MsgBox($MB_SYSTEMMODAL, "Excel UDF: _Excel_ColumnToLetter Example 1", "Number: " & $iCol & " = Letter: " & $sLetter)