> For the complete documentation index, see [llms.txt](https://documentation.nomos-system.com/nomos-system/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.nomos-system.com/nomos-system/integrator-en/variables/create-variable.md).

# Create Variable

To create a new variable in the nomos system Controller, fill in the following fields:

1. **ID:** Unique identifier used to reference the variable in automations and texts. You can assign your own ID (uppercase letters, digits, `-` and `_`) or leave the field empty – the ID is then generated automatically when you save. An ID that has already been saved can no longer be changed.
2. **Name:** A descriptive display name for the variable.
3. **Category:** Optional grouping to organize variables by topic (e.g. "Prices").
4. **Editable:** Determines whether the variable's value may be changed by users (e.g. in the nomos app).
5. **Data type:** Determines what kind of value the variable holds. The value input adapts automatically to the selected type:
   * **Text (String):** Any text.
   * **Whole number (Integer):** A number without decimals.
   * **Decimal (Float):** A number with decimals.
   * **Currency:** A monetary amount – the currency symbol defined in the system settings (e.g. €) is shown next to the value.
   * **On/Off (Boolean):** A truth value – on or off.
   * **Date:** A calendar date.
   * **Time:** A time of day.
6. **Value:** The current value of the variable. The input field depends on the selected data type.

Click **Add** to create the variable. For an existing variable, save changes with **Save** or remove it with **Delete**. To cancel the process, click **Cancel**.

<figure><img src="/files/RhTPETm2mvYpDzYNiCpU" alt="" width="563"><figcaption></figcaption></figure>

{% hint style="warning" %}
**Note:**

* **Important**: This tool is intended exclusively for **integrators** who have experience with automation and programming processes. Careless handling can lead to malfunctions.
  {% endhint %}


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