index-to-columnname
Returns the name of the Excel column (for example, "A", "B", "C") given the column index (for example, 1, 2, 3). The name of column 1 is "A".

Languages
Built-in, C#, Java, XSLT 2.0, XSLT 3.0.
Parameters
| Name | Type | Description | 
|---|---|---|
| n | xs:int | The 1-based index of the column. |