title: What is the difference between 'my' and 'our' in Perl?
body: <p>I know what <code>my</code> is in Perl. It defines a variable that exists only in the scope of the block in which it is defined. What does <code>our</code> do?</p>
  
  <p>How does <code>our</code> differ from <code>my</code>?</p>