# &+(_:_:) Returns the sum of the two given values, wrapping the result in case of any overflow. ``` static func &+ (lhs: Self, rhs: Self) -> Self ``` ## Parameters `lhs` The first value to add. `rhs` The second value to add. ## Discussion The overflow addition operator (`&+`) discards any bits that overflow the fixed width of the integer type. In the following example, the sum of `100` and `121` is greater than the maximum representable `Int8` value, so the result is the partial value after discarding the overflowing bits. ``` let x: Int8 = 10 &+ 21 // x == 31 let y: Int8 = 100 &+ 121 // y == -35 (after overflow) ``` For more about arithmetic with overflow operators, see [Overflow Operators](https://docs.swift.org/swift-book/LanguageGuide/AdvancedOperators.html#ID37) in *[The Swift Programming Language](https://docs.swift.org/swift-book/)*. --- 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)