# negate() Replaces this value with its additive inverse. ``` mutating func negate() ``` ## Discussion The following example uses the `negate()` method to negate the value of an integer `x`: ``` var x = 21 x.negate() // x == -21 ``` The resulting value must be representable within the value’s type. In particular, negating a signed, fixed-width integer type’s minimum results in a value that cannot be represented. ``` var y = Int8.min y.negate() // 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)