# RangeSet A set of values of any comparable type, represented by ranges. ``` struct RangeSet where Bound : Comparable ``` ## Overview You can use a range set to efficiently represent a set of `Comparable` values that spans any number of discontiguous ranges. Range sets are commonly used to represent multiple subranges of a collection, by storing ranges of a collection’s index type. In this example, `negativeSubranges` is a range set representing the locations of all the negative values in `numbers`: ``` var numbers = [10, 12, -5, 14, -3, -9, 15] let negativeSubranges = numbers.indices(where: { $0 < 0 }) // numbers[negativeSubranges].count == 3 numbers.moveSubranges(negativeSubranges, to: 0) // numbers == [-5, -3, -9, 10, 12, 14, 15] ``` ## Relationships ### Conforms To [`Hashable`](/documentation/Swift/Hashable) [`Sendable`](/documentation/Swift/Sendable) [`Copyable`](/documentation/Swift/Copyable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Equatable`](/documentation/Swift/Equatable) [`Escapable`](/documentation/Swift/Escapable) --- 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)