# abs(_:) Returns the absolute value of the given number. ``` func abs(_ x: T) -> T where T : Comparable, T : SignedNumeric ``` ## Parameters `x` A signed number. ## Return Value The absolute value of `x`. ## Discussion The absolute value of `x` must be representable in the same type. In particular, the absolute value of a signed, fixed-width integer type’s minimum cannot be represented. ``` let x = Int8.min // x == -128 let y = abs(x) // Overflow error ``` --- 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)