This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::CloudFormation::StackSet Parameter
<a name="aws-properties-cloudformation-stackset-parameter"></a>

The Parameter data type.

## Syntax
<a name="aws-properties-cloudformation-stackset-parameter-syntax"></a>

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

### JSON
<a name="aws-properties-cloudformation-stackset-parameter-syntax.json"></a>

```
{
  "[ParameterKey](#cfn-cloudformation-stackset-parameter-parameterkey)" : String,
  "[ParameterValue](#cfn-cloudformation-stackset-parameter-parametervalue)" : String
}
```

### YAML
<a name="aws-properties-cloudformation-stackset-parameter-syntax.yaml"></a>

```
  [ParameterKey](#cfn-cloudformation-stackset-parameter-parameterkey): String
  [ParameterValue](#cfn-cloudformation-stackset-parameter-parametervalue): String
```

## Properties
<a name="aws-properties-cloudformation-stackset-parameter-properties"></a>

`ParameterKey`  <a name="cfn-cloudformation-stackset-parameter-parameterkey"></a>
The key associated with the parameter. If you don't specify a key and value for a particular parameter, CloudFormation uses the default value that's specified in your template.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`ParameterValue`  <a name="cfn-cloudformation-stackset-parameter-parametervalue"></a>
The input value associated with the parameter.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)