> For the complete documentation index, see [llms.txt](https://docs.onum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onum.com/pipelines/actions/transformation/field-transformation/field-transformation-operations/list-manipulation/index-list-integer.md).

# Index list integer

## Description

This operation extracts specific elements from a list of integer values.

***

## Data types

These are the input/output expected data types for this operation:

### Input data

`ListInteger` - The input lists of integer values.

### Output data <a href="#output-data" id="output-data"></a>

`String` - The specific elements you want to extract.

***

## Parameters

These are the parameters you need to configure to use this operation (mandatory parameters are marked with a <mark style="color:red;">**\***</mark>):

<details>

<summary>Index<mark style="color:red;"><strong>*</strong></mark></summary>

Enter the list level you want to extract. Note that to extract the first level, you must enter the number `0`, and so on.

</details>

***

## Example

Suppose you want to **extract a specific value** **from your input list of integer values**:

1. In your Pipeline, open the required [Action](https://onum.gitbook.io/onum-docs/the-workspace/pipelines/actions) configuration and select the input **Field**.
2. In the **Operation** field, choose **Index list integer**.
3. Set **Index** to `2`.
4. Give your **Output field** a name and click **Save**. You'll get the value corresponding to the indicated position. For example:

```
0, 1, 2, 3 -> 2
```

{% hint style="info" %}
You can try out operations with specific values using the **Input** field above the operation. You can enter the value in the example above and check the result in the **Output** field.
{% endhint %}