> For the complete documentation index, see [llms.txt](https://docs.helmut.de/helmut4-releases/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.helmut.de/helmut4-releases/helmut4-components/streamdesigner/wildcards/variable-related-wildcards-3/store-variable.md).

# Store Variable ?

Store variables can be used across various streams. The big difference compared to temporary and helmut variables are that those can be created, modified and deleted within a stream.

For further informations have a look here: [Stream Variable Store](/helmut4-releases/helmut4-components/streamdesigner/stream-variable-store.md)

### Use of the wildcard

The wildcard is used in the following ways:

* Variable key: test1
* Variable value: hello<br>
* {store.variable.?}
* For the following input (?) --> test1
  * {store.variable.test1}
* The output is going to be --> hello

<figure><img src="/files/fc7VE2oclDb07od9ichq" alt="" width="351"><figcaption><p>Usage of a store variable</p></figcaption></figure>