What is the difference between a++ and ++a in JavaScript?

++a returns the value of an after it has been incremented. It is a pre-increment operator since ++ comes before the operand.

a++ returns the value of a before incrementing. It is a post-increment operator since ++ comes after the operand.

Example

You can try to run the following code to learn the difference between i++ and ++i −

<html>    <body>         <script>           var a =10;           var b =20;           //pre-increment operator           a = ++a;           document.write("++a = "+a);                       //post-increment operator           b = b++;           document.write("<br> b++ = "+b);       </script>    </body> </html>
Updated on: 2020-06-13T06:46:22+05:30

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