# ToUpper (String str)

| Name                     | *ToUpper*                                              |
| ------------------------ | ------------------------------------------------------ |
| Applicable To (DataType) | String                                                 |
| Purpose                  | To convert the string into uppercase characters.       |
| Description              | Converts a string into uppercase characters.           |
| Return Type              | String                                                 |
| Syntax                   | str \[System.String] – string which will be converted. |

![properties](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/properties%20\(13\).png)

## Example

In this example, we have customers data stored in an *Excel* sheet. We want to convert *CustomerContactName* into uppercase. So, we will map the *CustomerContactName* data field to *str* data field under the *Input* node inside the function transformation object.

![dataflow](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/dataflow%20\(14\).png)

Right-click on the function transformation object and select *Preview Output*. You can see that the value inside the data field has been converted into uppercase.

![output](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/output%20\(10\).png)