display sum of 20 natural numbers

        
<!doctype html>
<html>
   <head>
       <title>display sum of 20 natural numbers</TITLE>
   </HEAD>
   <body>
<h1>display sum of 20 natural numbers  </h1>
       <form name="f1">
           <input type="submit" value="Display sum of First 20 natural numbers" onMousemove="display()">
       </form>
    </body>
    <script language="Javascript">
          function display()
          {
              var i,sum=0;
              document.writeln("sum of 20 natural numbers is as follows:<br>");
              for(i=1;i<=20;i++)
              {
                  sum=sum+i;
              }
              document.writeln("sum of 20 natural numbers ="+sum);
          }
     </script>
</html>
Go back