# init(_:_:_:_:otherwise:) Creates a `When` condition comparing an optional union value parameter to a specific case. ``` init(_ keyPath: KeyPath, _ comparisonOperator: EquatableComparisonOperator, _ value: ValueType.ValueType.Cases, @ParameterSummaryBuilder _ when: () -> WhenCondition, @ParameterSummaryBuilder otherwise: () -> Otherwise) where ValueType : ExpressibleByNilLiteral, ValueType == Parameter.Value, Parameter : AnyIntentValue, ValueType.ValueType : AppUnionValue ``` ## Parameters `keyPath` Key path to the optional union value parameter `comparisonOperator` The comparison operator (`.equalTo` or `.notEqualTo`) `value` The union value case to compare against `when` The summary to use when the condition is true `otherwise` The summary to use when the condition is false --- 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)