title: Converting string to int/float in jQuery
body: <p>I am getting a value from a div :</p>
  
  <pre><code>&lt;div id="test"&gt;100&lt;/div&gt;
  </code></pre>
  
  <p>And what I want to do is to get the value with jQuery, raise with 50% and show the value.</p>
  
  <pre><code>$number= $('#test').text() //getting the value, without parseInt or parseFloat?
  $newNumber = $number * 0,5 //show the result of this
  </code></pre>
  
  <p>I often end up with NaN, so I'd like to have a guidance on that. Thank you.</p>