# init(description:defaultValue:defaultUnit:defaultUnitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:) Creates an app intent parameter with a default unit for the measurement. ``` convenience init(description: LocalizedStringResource? = nil, defaultValue: Double? = nil, defaultUnit: IntentParameter.Area? = nil, defaultUnitAdjustForLocale: Bool = false, supportsNegativeNumbers: Bool = true, requestValueDialog: IntentDialog? = nil, inputConnectionBehavior: InputConnectionBehavior = .default) ``` ## Parameters `description` Additional details about this parameter. `defaultValue` The default value for this parameter. People can specify a different value. `defaultUnit` The default unit that should be selected when this parameter is initially created. `defaultUnitAdjustForLocale` Whether or not the default unit should adjust to match someone’s locale. Default value is `false`. `supportsNegativeNumbers` Whether or not this parameter supports negative number inputs. Default value is `true`. `requestValueDialog` A prompt that asks a person to provide the parameter value. `inputConnectionBehavior` An enum that indicates how this parameter receives the output from a preceding app intent. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)