# init(capacity:) Returns a counted set object initialized with enough memory to hold a given number of objects. ``` init(capacity numItems: Int) ``` ## Parameters `numItems` The initial capacity of the new counted set. ## Return Value A counted set object initialized with enough memory to hold `numItems` objects ## Discussion The method is the designated initializer for [`NSCountedSet`](/documentation/Foundation/NSCountedSet). Note that the capacity is simply a hint to help initial memory allocation—the initial count of the object is `0`, and the set still grows and shrinks as you add and remove objects. The hint is typically useful if the set will become large. ## See Also [`+ setWithCapacity:`](/documentation/Foundation/NSMutableSet/setWithCapacity:) Creates and returns a mutable set with a given initial capacity. [`- initWithCapacity:`](/documentation/Foundation/NSMutableSet/init(capacity:)) Returns an initialized mutable set with a given initial capacity. --- 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)