How can I use a label with break statement in JavaScript?

Javascript Web Development Front End Technology

Starting from JavaScript 1.2, a label can be used with break statement to control the flow more precisely. A label is simply an identifier followed by a colon (:) that is applied to a statement or a block of code.

Example

You can try to run the following code to learn how to work with labels with break statement

Live Demo

<html>
   <body>
      <script>
         document.write("Entering the loop!<br /> ");
         outerloop: // This is the label name

         for (var i = 0; i < 5; i++) {
            document.write("Outerloop: " + i + "<br />");
           
            innerloop:
               for (var j = 0; j < 5; j++) {
                  if (j > 3 ) break ; // Quit the innermost loop
                  if (i == 2) break innerloop; // Do the same thing
                  if (i == 4) break outerloop; // Quit the outer loop
                  document.write("Innerloop: " + j + " <br />");
               }
         }
         document.write("Exiting the loop!<br /> ");
      </script>
   </body>
</html>

Monica Mona

Published on 23-Jan-2018 08:31:30

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