== Why is this an issue? include::../description.adoc[] === Noncompliant code example [source,swift] ---- func isOdd(x:Int) -> Bool { return x % 2 == 1 // Noncompliant; if x is negative, x % 2 == -1 } ---- === Compliant solution [source,swift] ---- func isOdd(x:Int) -> Bool { return x % 2 != 0 } ---- or [source,swift] ---- func isOdd(x:Int) -> Bool { return abs(x % 2) == 1 } ---- ifdef::env-github,rspecator-view[] ''' == Implementation Specification (visible only on this page) include::../message.adoc[] ''' == Comments And Links (visible only on this page) include::../comments-and-links.adoc[] endif::env-github,rspecator-view[]