Nested ``++if++``, ``++for++``, ``++while++``, ``++until++``, ``++case++`` and ``++begin...rescue++`` statements are key ingredients for making what's known as "Spaghetti code". Such code is hard to read, refactor and therefore maintain. ifdef::rspecator-view[] == Comments And Links (visible only on this page) include::../comments-and-links.adoc[] endif::rspecator-view[]