# Count list timestamp

## Description

This operation counts the number of elements in a given list of timestamps.

***

## Data types

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

### Input data

<img src="https://965373739-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FkxZeV4nlXcIAjMGZxzLI%2Fuploads%2FP4GrHIF7PUaFpaJ03hIO%2Fimage.png?alt=media&#x26;token=68457ece-c60e-4428-bd4f-d15c0f8b061e" alt="" data-size="line"> - The input lists of timestamps.

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

<img src="https://965373739-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FkxZeV4nlXcIAjMGZxzLI%2Fuploads%2FibLjK96EzwJtH9Ijf6VZ%2Fimage.png?alt=media&#x26;token=45263389-8cc0-45f6-b70e-e40fbd907064" alt="" data-size="line"> - Number of elements in the input lists.

***

## Example

Suppose you want to **count the number of elements in your input list of timestamps**:

1. In your Pipeline, open the required [Action](https://docs.onum.com/the-workspace/pipelines/actions) configuration and select the input **Field**.
2. In the **Operation** field, choose **Count list timestamp**.
3. Give your **Output field** a name and click **Save**. You'll get the number of elements in your input timestamp lists. For example:

```
Input data - 2024-05-17T14:30:00Z, 2022-10-19T14:30:04Z, 1998-04-10T14:49:00Z

Output data - 3
```

{% 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 %}


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