# minimumMagnitude(_:_:) Returns the value with lesser magnitude. ``` static func minimumMagnitude(_ x: Self, _ y: Self) -> Self ``` ## Parameters `x` A floating-point value. `y` Another floating-point value. ## Return Value Whichever of `x` or `y` has lesser magnitude, or whichever is a number if the other is NaN. ## Discussion This method returns the value with lesser magnitude of the two given values, preserving order and eliminating NaN when possible. For two values `x` and `y`, the result of `minimumMagnitude(x, y)` is `x` if `x.magnitude <= y.magnitude`, `y` if `y.magnitude < x.magnitude`, or whichever of `x` or `y` is a number if the other is a quiet NaN. If both `x` and `y` are NaN, or either `x` or `y` is a signaling NaN, the result is NaN. ``` Double.minimumMagnitude(10.0, -25.0) // 10.0 Double.minimumMagnitude(10.0, .nan) // 10.0 Double.minimumMagnitude(.nan, -25.0) // -25.0 Double.minimumMagnitude(.nan, .nan) // nan ``` The `minimumMagnitude` method implements the `minNumMag` 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)