title: Can Perl string interpolation perform any expression evaluation?
body: <p>related to question: <a href="https://stackoverflow.com/questions/3939788/perl-regex-substituion/3939854">How do I substitute with an evaluated expression in Perl?</a></p>
  
  <p>In Perl, is there a way like in Ruby to do:</p>
  
  <pre><code>$a = 1;
  print "#{$a + 1}";
  </code></pre>
  
  <p>and it can print out <code>2</code>?</p>