Variables that are never updated will always return their default values and so they should be explicitly declared as constant. A ``++let++``-declaration guarantees and clearly signals to the programmer that its value is supposed to and will never change. This rule applies to non-constant fields and variables which are not set within the codebase. 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[]