Math.round() : round « Math « JavaScript Tutorial

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JavaScript Tutorial » Math » round

9. 22. 1. Math.round()

Syntax


math.round(num)

The round() method rounds a number to its nearest integer value.

If the fractional portion of the number is .5 or greater, the result is rounded to the next highest integer.

If the fractional portion of number is less than .5, the result is rounded to the next lowest integer.


<html>

    <body>

    <script language="JavaScript">

    <!--

    function doMath(){

        var inputNum1=document.form1.input1.value;

        var result = Math.round(inputNum1);

        document.form1.answer.value = result;

    }

    -->

    </script>

    <form name=form1>

    Enter Number:

    <input type="text" name="input1" size=10>

    <input type="button" value="Round" onClick='doMath()'>

    <br>

    The rounded value is:

    <input type="text" name="answer" size=10>

    </form>

    </body>

    </html>

9. 22. round
	9. 22. 1.	Math.round()
	9. 22. 2.	Rounding a number to an integer
	9. 22. 3.	Use Math.round to calculate area

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