JavaScript Tutorial/Math/floor
Math.floor()
Syntax math.floor(num) Description Get the largest integer number, which is equivalent to or less than the number passed as the parameter.
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<html>
<body> <script language="JavaScript"> </script> <form name=form1> This example calculates the floor of the number entered.
Enter First Number: <input type="text" name="input" size=10> <input type="button" value="Calculate" onClick="doMath()">
The floor is: <input type="text" name="answer" size=10> </form> </body> </html></source>