# formIntersection(_:) Removes the contents of this range set that aren’t also in the given range set. ``` mutating func formIntersection(_ other: RangeSet) ``` ## Parameters `other` A range set to intersect with. --- 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)