write a javscript program to reverse of the number.

tejas deepak talkar June 20, 2020

In this javascript tutorial we are learning code about reverse of numbers using javascript language.

Reverse of number

  • Integer will become integer.                                                              123456 become 654321 & not 123456.00. 

  • Negative number remains negative only after the reverse.                 ex -1-2-3-4 becomes -4-3-2-1.

  • Any leading zero is been remove after reverse the number. ex 00123 is becomes 321 & not 32100

  • reverse function can accept float and integers.                                   Ex 123.456 is become 654.321  


write a javscript program to reverse of the number.

<html>

<head>

    <title>reverse of number</title>

    </head>

    <script type="text/javascript">

    function rev_num()

        {

    var num=prompt("enter nmber:"," ");

        var n=num;

        var rev=0,rem;

        while(n>0)

            {

                rem=n%10;

                rev=rev*10+rem;

                n=parseInt(n/10);

            }

        document.write("the given nummber is :"+num+"<br/> the reverse number is:"+rev+"\n");

        }

    </script>

    <body align="center" style="font-size:30px" onload="rev_num()">

        <!-- When the page gets loaded rev-num() function gets called-->

    </body>

    

</html>



output:
write a javscript program to reverse of the number.

write a javscript program to reverse of the number.
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