# +(_:_:) Adds two values and produces their sum, rounded to a representable value. ``` static func + (lhs: Float, rhs: Float) -> Float ``` ## Parameters `lhs` The first value to add. `rhs` The second value to add. ## Discussion The addition operator (`+`) calculates the sum of its two arguments. For example: ``` let x = 1.5 let y = x + 2.25 // y == 3.75 ``` The `+` operator implements the addition operation defined by the [IEEE 754 specification](http://ieeexplore.ieee.org/servlet/opac?punumber=4610933). --- 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)