> For the complete documentation index, see [llms.txt](https://docs.uniot.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.uniot.io/platform/sandbox/visual-editor/variables.md).
# Variables
Variables store and manage data in your scripts. Use variables to track changing values like sensor readings, counters, states, or calculated results.
{% hint style="info" %}
Create variables through the Variables section in the toolbox before using them. Variable names are case-sensitive - choose meaningful names to make your code easier to understand.
{% endhint %}
## set
Assigns a value to a variable. If the variable doesn't exist, it's created automatically.
**Parameters:**
* **Variable**: Select from the dropdown or create a new variable
* **Value** (Any): The value to store
**Example:**
Setting variables
## get
Retrieves the current value stored in a variable.
**Parameters:**
* **Variable**: Select which variable to read
**Returns:**
* **Any**: The current value of the variable
**Example:**
Getting variable values
## change
Increments or decrements a numeric variable by adding a value to it. Use negative values to subtract.
**Parameters:**
* **Variable**: Select which variable to modify
* **Value** (Number): The amount to add (use negative for subtraction)
**Example:**
Modifying variables
## Managing Variables
The variable dropdown menu in each block provides options to:
* **Select** existing variables from your script
* **Rename** the selected variable (updates all references)
* **Delete** the selected variable (removes from all blocks)
{% hint style="warning" %}
Renaming or deleting a variable affects **all blocks** that use it. Be careful when modifying variables used in multiple places.
{% endhint %}