# Numeric Implementations ## Topics ### Operators [`static func * (UInt128, UInt128) -> UInt128`](/documentation/Swift/UInt128/*(_:_:)) Multiplies two values and produces their product. [`static func *= (inout UInt128, UInt128)`](/documentation/Swift/UInt128/*=(_:_:)) Multiplies two values and stores the result in the left-hand-side variable. ### Initializers [`init?(exactly: T)`](/documentation/Swift/UInt128/init(exactly:)-rax0) Creates a new instance from the given integer, if it can be represented exactly. ### Instance Properties [`var magnitude: UInt128`](/documentation/Swift/UInt128/magnitude-5klmz) The magnitude of this value. ### Type Aliases [`typealias Magnitude`](/documentation/Swift/UInt128/Magnitude-swift.typealias) A type that can represent the absolute value of any possible value of the conforming type. --- 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)