Calculate ceiling of the any number through math.ceil() function

 
Math.ceil function returns the smallest integer greater than or equal to its numeric argument.
You can use this function as :
Math.ceil(number)
where number is the number.

The return value is an integer value equal to the smallest integer greater than or equal to its numeric argument.

Example

<html>
  <body>
    <script language="JavaScript">
    <!--
    function CalculateResult(){
        var Number1=document.form1.txtNumber1.value; 
        var result = Math.ceil(Number1);
        document.form1.answer.value = result;
    }
    -->
    </script>
    <form name=form1>
    Enter number:
    <input type="text" name="txtNumber1">
    <br>    
    <input type="button" value="Calculate" onClick='CalculateResult()'>
    <br>
    result :
    <input type="text" name="answer" size=10>
    </form>
  </body>
</html>