# ToLower(String str)

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

![properties](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2F0rvICQaCzdA4LidAkPQA%2Fproperties.png?alt=media)

## Example

In this example, we have a customer’s data in which we want to convert the *CustomerID* information into lower case. Map the *CustomerID* to the *str* data field under the *Input* node inside the function transformation object.

![dataflow](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2Fs3FxOklemvSerB3haG1e%2Fdataflow.png?alt=media)

Right-click on the header of function transformation object and select *Preview Output*. You can see that all the *CustomerIDs* have been converted into lower case.

![output](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FN7cNT3swsxf4iTvns0VP%2Foutput.png?alt=media)