***

id: cf460ee1-838a-49cd-8402-8e86a3d57ef3
title: Conditions
description: Call Flow Builder node to add conditions to your call flow.
slug: /reference/conditions
max-toc-depth: 3
----------------

A Conditions node works like a
[JavaScript if statement](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Control_flow_and_error_handling#if...else_statement).

A condition field can reference variables that have been set in the flow with `%{Key}`,
Request node responses accessed with `%{request_response.<object_field>}`,
or call parameters such as `%{call.from}`.
Add additional conditions to create `else if` conditions.

The `Cond #` path will be executed for a truthy condition. The `Else` path will be executed for a falsy condition.

## Output Node Connectors

<ParamField path="Condition" type="string" toc={true}>
  The condition that is evaluated to determine which path to take. Additional conditions can be added by clicking the `Add condition` button. Additional conditions will act as JavaScript `else-if` statements.
</ParamField>

<ParamField path="Else" type="string" toc={true}>
  The path to take if none of the conditions are met.
</ParamField>

## Node Settings

<ParamField path="Conditions" type="string" toc={true}>
  The conditions that are evaluated to determine which path to take. Additional conditions can be added by clicking the `Add condition` button. Additional conditions will act as JavaScript `else-if` statements.
</ParamField>

## Example

### Use conditions to create a block list

In this example, we immediately hang up calls from specific numbers on our block list and forward call from a VIP directly to our administration number.
All other calls will connect to the main reception number.

<Frame caption="Block or pass through calls based on caller number." ogImage>
  ![Block or pass through calls based on caller number.](https://files.buildwithfern.com/signalwire.docs.buildwithfern.com/docs/81ae49109a78c5cd27063cae6527589be772edb6e1501b5f829271973603ec68/assets/images/call-flow/nodes/block-condition.webp)
</Frame>