***

id: f44ede23-3d11-428d-8d47-68d06aabdd96
title: Unset Variables
description: Call Flow Builder node to unset variables in the call flow.
slug: /reference/unset-variables
max-toc-depth: 3
----------------

The Unset Variables is used to clear any variable that was set using [Set Variables](/docs/call-flow-builder/reference/set-variables).
All currently set variables are populated in the dropdown menu.
You can unset multiple variables in one node by selecting multiple variables from the dropdown menu.

## Node Settings

<ParamField path="Variables" type="array" toc={true}>
  The variables that you want to unset. Variables will show in the drop-down menu if they are set in the call flow. Variables are set by [Set Variables](/docs/call-flow-builder/reference/set-variables) node.
</ParamField>

## Example

In the example below, we answer the call and set a variable `from_number` with the value
of the caller's number. We then play a message to the caller and unset the `from_number` variable.

<Frame caption="Unset a variable from a Call Flow node." ogImage>
  ![Unset a variable from a Call Flow node.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/7c894e32044ed0f88ab551a34d9d687a8c03a8ee14b71007d76675d8cc8cc5c3/assets/images/call-flow/nodes/unset_vars.webp)
</Frame>