adding numbers doesn't add up !!! help

[arwilliams]

Ok I am a complete newbie, so remember we all start somewhere!

I am trying to add three numbers together, but it never gives me what I want. My numbers where originally coming from variables so I thought perhaps there was something wrong with how i had set it up. So I hardcoded them and simplified it to the following :


<script language="JavaScript" type="text/JavaScript">
alert (494.06 + 576.26 + 514.06)
</script>

The answer I get is : 1584.3799999999998

What is going on ????????

Many thanks

[sde]

that looks right to me. what do you want it to return?

[arwilliams]

I am dealing with currency so I need 1584.38.

I am assuming its something to do with the way numbers are dealt with by javascript?

[sde]

toFixed(2) =)

<script langauge=javascript>
var i = 494.06 + 576.26 + 514.06;
alert("before toFixed(2): "+i);
i = i.toFixed(2);
alert("after toFixed(2): "+i);
alert("all in one line: "+(494.06 + 576.26 + 514.06).toFixed(2) );
</script>