title: jQuery iterating over objects using %
body: <p>I see the use of "%" a lot in <a href="http://learn.jquery.com/using-jquery-core/iterating/" rel="nofollow">this</a> jQuery documenation.</p>
  
  <p>Example:</p>
  
  <pre><code>$( "input" ).each( function( i, el ) {
  var elem = $( el );
  elem.val( elem.val() + "%" );
  });
  
  $( "input" ).val(function( index, value ) {
      return value + "%";
  });
  </code></pre>
  
  <p>What is the meaning of, "%" in these contexts? </p>