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# AWS::Bedrock::FlowVersion LoopFlowNodeConfiguration
<a name="aws-properties-bedrock-flowversion-loopflownodeconfiguration"></a>

Contains configurations for the nodes of a DoWhile loop in your flow.

A DoWhile loop is made up of the following nodes:
+ `Loop` - The container node that holds the loop's flow definition. This node encompasses the entire loop structure.
+ `LoopInput` - The entry point node for the loop. This node receives inputs from nodes outside the loop and from previous loop iterations.
+ Body nodes - The processing nodes that execute within each loop iteration. These can be nodes for handling data in your flow, such as a prompt or Lambda function nodes. Some node types aren't supported inside a DoWhile loop body. For more information, see [LoopIncompatibleNodeTypeFlowValidationDetails](https://docs.aws.amazon.com/bedrock/latest/APIReference/API_agent_LoopIncompatibleNodeTypeFlowValidationDetails.html).
+ `LoopController` - The node that evaluates whether the loop should continue or exit based on a condition.

These nodes work together to create a loop that runs at least once and continues until a specified condition is met or a maximum number of iterations is reached.

## Syntax
<a name="aws-properties-bedrock-flowversion-loopflownodeconfiguration-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-bedrock-flowversion-loopflownodeconfiguration-syntax.json"></a>

```
{
  "[Definition](#cfn-bedrock-flowversion-loopflownodeconfiguration-definition)" : FlowDefinition
}
```

### YAML
<a name="aws-properties-bedrock-flowversion-loopflownodeconfiguration-syntax.yaml"></a>

```
  [Definition](#cfn-bedrock-flowversion-loopflownodeconfiguration-definition): 
    FlowDefinition
```

## Properties
<a name="aws-properties-bedrock-flowversion-loopflownodeconfiguration-properties"></a>

`Definition`  <a name="cfn-bedrock-flowversion-loopflownodeconfiguration-definition"></a>
The definition of the DoWhile loop nodes and connections between nodes in the flow.  
*Required*: Yes  
*Type*: [FlowDefinition](aws-properties-bedrock-flowversion-flowdefinition.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)