# Helmut Variable ?

Helmut variables can be used across various streams. The variables need to be set up in the module preferences.

For further informations have a look here: [Helmut Variable](https://docs.helmut.de/helmut4-releases/v4.10.1/helmut4-components/helmutfx/preferences/helmut-variables)

This wildcard is replaced by the value of a variable that was defined in the Helmut preferences. The name/key of the variable is used as input.

### Use of the wildcard

The wildcard is used in the following ways:

* Variable key: test1
* Variable value: hello

<figure><img src="https://content.gitbook.com/content/ttnkf7qEIoqtmdv6485i/blobs/aye8XRM3q0j4wlfxnptv/image.png" alt=""><figcaption><p>Helmut variable set up in preferences</p></figcaption></figure>

* {helmut.variable.?}
* For the following input (?) --> test1
  * {helmut.variable.test1}
* The output is going to be --> hello

<figure><img src="https://content.gitbook.com/content/ttnkf7qEIoqtmdv6485i/blobs/9iMTTKYyUBtGV1IWOmN0/image.png" alt="" width="349"><figcaption><p>Usage of a helmut variable</p></figcaption></figure>

{% hint style="warning" %}
Any changes towards helmut variables in the preferences will be available to all nodes referring to the key/value.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.helmut.de/helmut4-releases/v4.10.1/helmut4-components/streamdesigner/wildcards/variable-related-wildcards-3/helmut-variable.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.