title: what does this javascript on keeping score for quiz mean?
body: <p>I have a question about this code. It is supposed to keep score of a quiz.</p>
  
  <pre><code>function point() {
  var questions = document.getElementsByTagName("input");
  var value_list = [];
  var point = 0;
  for (var i = 0; i &lt; questions.length; i++) {
      value_list.push(questions[i].value);
      if (questions[i].checked) {
          point += Number(value_list[i])
      }
  }
  </code></pre>