# XCTAssertNotEqual(_:_:accuracy:_:file:line:) Asserts that two numeric values aren’t equal within a specified accuracy. ``` func XCTAssertNotEqual(_ expression1: @autoclosure () throws -> T, _ expression2: @autoclosure () throws -> T, accuracy: T, _ message: @autoclosure () -> String = "", file: StaticString = #filePath, line: UInt = #line) where T : Numeric ``` ## Parameters `expression1` An expression of type `T`, where `T` conforms to . `expression2` A second expression of type `T`, where `T` conforms to . `accuracy` An expression of type `T`, where `T` conforms to . This parameter describes the maximum difference between `expression1` and `expression2` for these values to be considered not equal. `message` An optional description of a failure. `file` The file where the failure occurs. The default is the filename of the test case where you call this function. `line` The line number where the failure occurs. The default is the line number where you call this function. ## Discussion `expression1`, `expression2`, and `accuracy` must all be of the same type `T`, and type T must conform to . --- 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)