title: Increment (++) and decrement (--) strings in Perl
body: <p>With <code>perl -e '$string="a";print ++$string;'</code> we get <code>b</code>,<br> 
  but with <code>perl -e '$string="b";print --$string;'</code> we get <code>-1</code>.<br></p>
  
  <p>So, if we can increment why can't we decrement?<br></p>
  
  <p>EDITED<br>
  "The auto-decrement operator is not magical" by <a href="http://perldoc.perl.org/perlop.html#Auto-increment-and-Auto-decrement" rel="noreferrer">perlop</a></p>
  
  <p>Perl give us lots of facilities, why not this one? This is not criticism, but wouldn't be expected similar behavior for similar operators? Is there any special reason?</p>