# ReplaceLast

| **Name**    | ***ReplaceLast***                                                                                                                                                                                                                                                        |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Syntax      | ReplaceLast (String str, String lookFor, String replaceWith)                                                                                                                                                                                                             |
| Purpose     | To replace the last occurrence of lookFor with replaceWith.                                                                                                                                                                                                              |
| Description | Returns the resulting string after removing the last occurrence of the specified string. If the specified string is not found, the original string is returned.                                                                                                          |
| Return Type | String                                                                                                                                                                                                                                                                   |
| Parameters  | <p>Str \[System.String] – String in which the characters will be replaced</p><p>lookFor \[System.String] – The string that will be searched</p><p>replaceWith \[System.String] – String that will replace the searched string</p><p>isCaseSenitive \[System.Boolean]</p> |

![](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FnG6YpMReQPzDDAb1YW3i%2F0.png?alt=media)

**Example**

In this example, we are passing the required parameters to the function transformation object using a *Variables* object.

Where,

*str =* ABABABA

*lookFor* = b

*replaceWith ­*= C

*charsToRemove* = False

![](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FiUujPsfPfvbm7pYdRM5b%2F1.png?alt=media)

Right-click on the function transformation object and select *Preview Output.* You can see that Astera Data Stack has returned a string, having replaced the last occurrence of a specified string with another provided string.

![](https://3083465318-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsR50Wa7EwZGlmPSAMkkf%2Fuploads%2FSq9yxGAY6ozmknuOMX5g%2F2.png?alt=media)