# base The underlying collection of the slice. ``` var base: Base { get } ``` ## Discussion You can use a slice’s `base` property to access its base collection. The following example declares `singleDigits`, a range of single digit integers, and then drops the first element to create a slice of that range, `singleNonZeroDigits`. The `base` property of the slice is equal to `singleDigits`. ``` let singleDigits = 0..<10 let singleNonZeroDigits = singleDigits.dropFirst() // singleNonZeroDigits is a Slice> print(singleNonZeroDigits.count) // Prints "9" print(singleNonZeroDigits.base.count) // Prints "10" print(singleDigits == singleNonZeroDigits.base) // Prints "true" ``` --- 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)