Prototype - round() Method

Quiz

This method rounds the number to the nearest integer.

Syntax

number.round();

Return Value

Rounds the number to the nearest integer.

Example

<html>
   <head>
      <title>Prototype examples</title>
      <script type = "text/javascript" src = "/javascript/prototype.js"></script>
      
      <script>
         function showResult() {
            alert( "Math.round(4.5) : " + Math.round(4.5) );
            alert( "(4.5).round()  : " + (4.5).round() );
            alert( "(4.49).round()  : " + (4.49).round()  );
            alert( "(-4.5).round()  : " + (-4.5).round()  );
         }
      </script>
   </head>

   <body>
      <p>Click the button to see the result.</p>
      <br />
      <br />
      <input type = "button" value = "Result" onclick = "showResult();"/>
   </body>
</html>

Output

prototype_number_processing.htm

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