# ParameterDeclaration
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The `ParameterDeclaration` data type.

## Contents
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 ** DefaultValue **   
The default value of the parameter.  
Type: String  
Required: No

 ** Description **   
The description that's associate with the parameter.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Required: No

 ** NoEcho **   
Flag that indicates whether the parameter value is shown as plain text in logs and in the AWS Management Console.  
Type: Boolean  
Required: No

 ** ParameterConstraints **   
The criteria that CloudFormation uses to validate parameter values.  
Type: [ParameterConstraints](API_ParameterConstraints.md) object  
Required: No

 ** ParameterKey **   
The name that's associated with the parameter.  
Type: String  
Required: No

 ** ParameterType **   
The type of parameter.  
Type: String  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/cloudformation-2010-05-15/ParameterDeclaration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudformation-2010-05-15/ParameterDeclaration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudformation-2010-05-15/ParameterDeclaration)