Round Number - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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Round Number

A simple function to round a decimal number to any number of decimal places you want just by passing it different values. Neat! Very short code, too!


Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin function round(number,X) { // rounds number to X decimal places, defaults to 2 X = (!X ? 2 : X); return Math.round(number*Math.pow(10,X))/Math.pow(10,X); } // End --> </SCRIPT>

Insert into <BODY>
<script> document.write( round(1,2) + '<br>'); document.write( round(1.2,2) + '<br>'); document.write( round(1.23,2) + '<br>'); document.write( round(1.234,2) + '<br>'); document.write( round(1.2345) + '<br>'); </script>

Other Options