> For the complete documentation index, see [llms.txt](https://documentation.astera.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.astera.com/astera-data-stack-v6/functions/string/removeat-string-str-integer-startat-integer-noofchars.md).

# RemoveAt (String str, Integer startAt, Integer noofChars)

| Name                     | *RemoveAt*                                                                          |
| ------------------------ | ----------------------------------------------------------------------------------- |
| Applicable To (DataType) | String                                                                              |
| Purpose                  | To remove the desired number of characters from a given string.                     |
| Description              | Removes the number of characters starting with startPosition from the given string. |
| Return Type              | String                                                                              |
| Syntax                   | str \[System.String] – input string                                                 |
|                          | startAt \[System.Int64] – position of the first character to be removed.            |
|                          | noOfChars \[System.Int64] – number of characters to be removed.                     |

![properties](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/properties%20\(1\).png)

## Example

We have 3 parameters, *str, startAt* and *noOfChars*, in a *Variables* object in which we have specified the default values as:

*str* = Charles Dickens

*startAt* = 8

*noOfChars* = 7

Map the data fields from the *Variables* object to the respective data fields under the *Input* node inside the function object.

![dataflow](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/dataflow%201618230657185.png)

Now, right-click on the *RemoveAt* function transformation object and select *Preview Output*. You can see that starting from position 8, 7 characters have been removed from the string.

![output](https://github.com/astera-software/Astera_Data_Stack_v9/blob/main/.gitbook/assets/output%20\(1\).png)


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