> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chatling.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Types of variables

> There are two types of variables: System Variable and Custom Variable. Learn how to use them in your chatbot.

Variables in the Builder are of two types:

* System Variable
* Custom Variable

## System Variable

<img src="https://chatling-assets.b-cdn.net/system-variables-sidebar-menu.png" alt="System variables" width="400" />

System variables are predefined variables that contain system information or which can be used to perform specific actions. These variables are automatically created by the Builder.

To learn what a specific system variable does, you can open it from the Variables menu in the [sidebar](/chatbot/builder/sidebar) and read its description.

There are also additional system variables that aren't imported by default. To view and import them, go to the Variables menu from the [Sidebar](/chatbot/builder/sidebar) and click the `Import system variables` button.

<img src="https://chatling-assets.b-cdn.net/import-system-variables-page.jpg" alt="Import system variables" width="400" />

## Custom Variable

These are variables that you create to store information specific to your chatbot.

For example, you can create a custom variable to store the user's query and pass it to the AI for generating a response from the knowledge base.