JavaScript switch...case 语句

JavaScript switch...case 语句

<html>
   <body>
      <script>
         var grade = 'A';
         document.write("Entering switch block<br />");
         switch(grade) {
            case'A': document.write("Good job <br />");
            break;

            case'B': document.write("Pretty good <br />");
            break;

            case'C': document.write("Passed <br />");
            break;

            case'D': document.write("Not so good <br />");
            break;

            case'F': document.write("Failed <br />");
            break;

            default:  document.write("Unknown grade<br />")
         }
         document.write("Exiting switch block");
      </script>
   </body>
</html>