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  "identifier" : "/documentation/AppIntents/IntentParameter-Measurements-Electric-Difference",
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  "title" : "Electric potential difference"
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# Electric potential difference

Configure the details for parameter variables that contain values of electric
potential difference.

## Topics

### Creating an intent parameter

[`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, defaultUnit: IntentParameter<Value>.ElectricPotentialDifference?, defaultUnitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:defaultUnit:defaultUnitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:)-20tna)

Creates an app intent parameter with a default unit for the measurement.

[`convenience init<Spec>(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, defaultUnit: IntentParameter<Value>.ElectricPotentialDifference?, defaultUnitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, resolvers: () -> Spec)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:defaultUnit:defaultUnitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:resolvers:)-5zan3)

Creates an app intent parameter with a default unit for the measurement.

[`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, unit: IntentParameter<Value>.ElectricPotentialDifference, unitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:unit:unitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:)-85h1x)

Creates an app intent parameter that specifies the unit for the measurement.

[`convenience init<Spec>(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, unit: IntentParameter<Value>.ElectricPotentialDifference, unitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, resolvers: () -> Spec)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:unit:unitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:resolvers:)-90byi)

Creates an app intent parameter that specifies the unit for the measurement.

[`convenience init<OptionsProvider>(title: LocalizedStringResource, description: LocalizedStringResource?, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, optionsProvider: OptionsProvider)`](/documentation/AppIntents/IntentParameter/init(title:description:requestValueDialog:inputConnectionBehavior:optionsProvider:)-5tqr4)

Creates an app intent parameter with a list of selectable options.

### Accessing unit details

[`var unit: IntentParameter<Value>.ElectricPotentialDifference?`](/documentation/AppIntents/IntentParameter/unit-3clo2)

[`enum ElectricPotentialDifference`](/documentation/AppIntents/IntentParameter/ElectricPotentialDifference)

[`var defaultUnit: IntentParameter<Value>.ElectricPotentialDifference?`](/documentation/AppIntents/IntentParameter/defaultUnit-2uqct)

[`var supportsNegativeNumbers: Bool?`](/documentation/AppIntents/IntentParameter/supportsNegativeNumbers-4hoq0)

[`var unitAdjustForLocale: Bool?`](/documentation/AppIntents/IntentParameter/unitAdjustForLocale-7e0ti)


---

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