title: Use of uninitialized value in string
body: <p>Use of uninitialized value in string 
  Where is mistake?</p>
  
  <pre><code>else{
      print $q-&gt;param('test_name');
  
      my $age = $q-&gt;param('age');
  
      print "Возраст: $age";
  
  }
  </code></pre>