title: String.fromCharCode gives no result javaScript
body: <p>after running code i get no result in window. and i cant find problem
  result have to be string created from charCode.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>function rot13(str) {
    var te = [];
    var i = 0;
    var a = 0;
    var newte = [];
  
    while (i &lt; str.length) {
      te[i] = str.charCodeAt(i);
      i++;
    }
    while (a != te.length) {
      if (te[a] &lt; 65) {
        newte[a] = te[a] + 13;
      } else
        newte[a] = te[a];
      a++;
    }
  
    var mystring = String.fromCharCode(newte);
  
  
    return mystring;
  }
  
  // Change the inputs below to test
  rot13("SERR PBQR PNZC");</code></pre>
  </div>
  </div>
  </p>