# 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://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/0%20\(182\).png)

**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://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/1%20\(182\).png)

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://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/2%20\(183\).png)