# sign The sign of the floating-point value. ``` var sign: FloatingPointSign { get } ``` ## Discussion The `sign` property is `.minus` if the value’s signbit is set, and `.plus` otherwise. For example: ``` let x = -33.375 // x.sign == .minus ``` Don’t use this property to check whether a floating point value is negative. For a value `x`, the comparison `x.sign == .minus` is not necessarily the same as `x < 0`. In particular, `x.sign == .minus` if `x` is -0, and while `x < 0` is always `false` if `x` is NaN, `x.sign` could be either `.plus` or `.minus`. --- 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)