What are Default parameters in JavaScript?

JavascriptWeb DevelopmentFront End Technology

default

The default parameter came to handle function parameters with ease. You can easily set Default parameters to allow initializing formal parameters with default values. This is possible only if no value or undefined is passed. Let’s see an example

Live demo

<html>
   <body>
      <script>
         // default is set to 1
         function inc(val1, inc = 1) {
            return val1 + inc;
         }
         document.write(inc(10,10));
         document.write("<br>");
         document.write(inc(10));
      </script>
   </body>
</html>
raja
Published on 24-Jan-2018 06:56:23
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