Is the Shakespeare Programming Language Turing complete?
In that page, the snippet

Juliet:
 Am I better than you?

Hamlet:
 If so, let us proceed to scene III.


essentially means

if (Juliet &gt; Hamlet) goto Scene III


This can be used to implement while loops. In pseudo syntax:

Scene II:
if (Juliet &gt; Hamlet) goto Scene III
... some statements here
goto Scene II
Scene III:
... more statements here


is essentially equivalent to

while (Juliet &lt;= Hamlet) {
   ... some statements here
}
... more statements here