Prototype floor() Method

Syntax:

number.floor();

Return Value:

Returns the largest integer less than or equal to the number.

Example:

<html>
<head>
<title>Prototype examples</title>
<script type="text/javascript" 
   src="/javascript/prototype.js">
</script>
<script>

function showResult(){

   alert( "Math.floor(4.6) : " + Math.floor(4.6) );
   alert( "(4.6).floor()  : " + (4.6).floor() );
   alert( "(-4.1).floor()  : " + (-4.1).floor()  );
}

</script>
</head>

<body>

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

</body>
</html>

To understand it in better way you can Try it yourself.