# createBranch(value:attribute:) Creates a child node that the decision tree should use when the current node’s attribute has the specified value. ``` func createBranch(value: NSNumber, attribute: any NSObjectProtocol) -> Self ``` ## Parameters `value` The value for this node’s attribute that should result in following the newly created branch. `attribute` The attribute for the child node to create. ## Return Value The newly created child node. ## Discussion Use this method to specify a possible result of testing this node’s attribute (that is, an answer for this node’s question). The `attribute` parameter an have either of two kinds of values: if this test produces the decision tree’s final result (or action), the value identifies that action; if the next step in the decision tree is to be another question, the value identifies the next attribute to test (or question to ask). The `value` parameter is a specific value for this node’s attribute, so this method is useful for questions that must have one of a few specific answers. (If a question has many possible answers, see the [`createBranch(predicate:attribute:)`](/documentation/GameplayKit/GKDecisionNode/createBranch(predicate:attribute:)) method instead.) For example, a strategy combat game might use this method to choose an attack based on the type of opponent: ```swift enum MyEnemyType: Int { case Water, Electric, Fire } let tree = GKDecisionTree(attribute: "HP?") let root = tree.rootNode root.createBranch(withValue: MyEnemyType.Water.rawValue, attribute: "Water Blast") root.createBranch(withValue: MyEnemyType.Electric.rawValue, attribute: "Electric Shock"]; root.createBranch(withValue: MyEnemyType.Fire.rawValue, attribute: "Fire"]; ``` --- 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)