Well, &quot;1.WHAT.say&quot; is also available.<p>But Perl 6 is designed to put code smells in capital letters.  EVAL, for example.  WHAT shouldn&#x27;t be used in normal code, but it&#x27;s useful as a teaching tool or for debugging.  If you want to test if something is an integer, you&#x27;ll want &quot;1 ~~ Int&quot; instead.