# What is a Row? What is a Column?

Rows and columns are the structural units of every **RadSpreadProcessing** worksheet. Use this article to understand how rows and columns are identified, what sizing options they provide, and which related APIs help you work with them in code.

## Row and Column Addressing

A worksheet organizes cells into rows and columns. **Rows** are groups of cells on the same horizontal line. Excel addresses rows from 1 through 1,048,576. The row and column indexes that the API uses are zero-based.

**Columns** are groups of cells stacked on the same vertical line. Excel addresses columns from A through XFD.

A cell sits at the intersection of one row and one column, and its address combines the column letter and row number. For example, `B3` refers to the cell in column B, row 3. In the API, `CellIndex(2, 1)` refers to the same cell because the row and column indexes start at zero.

![Spreadsheet example with row 9 highlighted horizontally and column B highlighted vertically to illustrate how rows and columns are identified](https://www.telerik.com/document-processing-libraries/documentation/assets/de4510c64a89015c978d38dcc47d1c1d/rowandcolumn.png)

## Row Height

Rows offer several approaches for determining their height:

| Option         | Description                                                                                                                                    |
| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| Default Height | Each row has a default height of 20. When the row does not have an explicitly set height, it appears with its default height.                  |
| Height         | Allows you to make a given set of rows appear with a fixed height.                                                                             |
| Auto Fit       | Sets the height of a specific row based on the content of all cells in the row. The height is determined by the cell with the tallest content. |

## Column Width

Columns offer several approaches for determining their width:

| Option        | Description                                                                                                                                        |
| ------------- | -------------------------------------------------------------------------------------------------------------------------------------------------- |
| Default Width | Each column has a default width of 65. When the column does not have an explicit width set, it appears with its default width.                     |
| Width         | Allows you to make a given set of columns appear with a fixed width.                                                                               |
| Auto Fit      | Sets the width of a specified column based on the content of all cells in the column. The width is determined by the cell with the widest content. |

For more information about setting row height and column width, see [Resizing Rows and Columns](https://www.telerik.com/document-processing-libraries/documentation/libraries/radspreadprocessing/working-with-rows-and-columns/resizing).

## See Also

* [Insert and Remove Rows and Columns](https://www.telerik.com/document-processing-libraries/documentation/libraries/radspreadprocessing/working-with-rows-and-columns/insert-and-remove)
* [Resizing Rows and Columns](https://www.telerik.com/document-processing-libraries/documentation/libraries/radspreadprocessing/working-with-rows-and-columns/resizing)
* [Hidden Rows and Columns](https://www.telerik.com/document-processing-libraries/documentation/libraries/radspreadprocessing/working-with-rows-and-columns/hidden-rows-columns)