Mega Code Archive
Formatting numbers to a chosen number of decimal places
<![CDATA[
< html>
<head>
<title>Formatting numbers to a chosen number of decimal places</title>
<script type="text/javascript" language="javascript">
<!-- //
function Calculate(){
var entry;
var first;
var second;
var numPlaces;
first = Number(1);
second = Number(3);
numPlaces = Number(2);
var n = first / second;
document.write(n+" vs "+formatNumber(n,numPlaces));
}
function formatNumber(theNum, numDecPlaces)
{
var num = new String();
num = "" + theNum;
var pos = 0;
count = 0;
while (num.substring(pos-1,pos)!== ".") {
pos += 1 ;
count += 1;
}
while (pos < (count+numDecPlaces)){
pos +=1;
}
return num.substring(0,pos);
}
// -->
</script>
</head>
<body onload="Calculate()">
</body>
</html>
]]>