What is the best way to break from nested loops in JavaScript?

Javascript Web Development Front End Technology

The best way to break from nested loops is to use labels. A label can be used with break and continue 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 implement Label with a break statement to break from nested loops −

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>

Jennifer Nicholas

Published on 19-Jan-2018 06:47:22

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