Problem with mathematical operation

[randomhero69]

I builded a little script that can calculate the difference of two prices.. The values should have decimals. When I try my function, it returns 479.9600000000003 instead of 479.96 ... Any ideas? Here's the script :

===========================================================

<script language="JavaScript">
var totalPrice = 1139.45;
var articlePrice = 659.49;

function calculateDifference() {
totalPrice = totalPrice - articlePrice;
alert(totalPrice);
}
</script>

<form action="" method="post" name="monForm" id="monForm">

(1139.45 - 659.49)<br>
<br>
I think the answer should be 479.96 but...<br>
<br>
<input type="submit" name="btn" value="Calculate difference" onclick="calculateDifference()">

</form>

===========================================================

Thanks a lot!

 

[checkai]

Alert(totalPrice.toFixed(2));

"...we both know I'm training to become a cagefighter...see what happens if you try 'n hit me..."

 

[kaht]

javascript is case sensitive -> make sure that Alert starts with a lower case a. As an aside, builded is not a word.

-kaht

...looks like you don't have a job, so why don't you get out there and feed Tina.

 

[cLFlaVA]

kaht,

what you writed about? i no understanded.

*cLFlaVA
----------------------------
[tt]your mom goes to college[/tt]
[URL unfurl="true"]http://www.coryarthus.com/[/url]

 

[kaht]

This kinda illustrates that it's no surprise that my replies have been lacking as of late. It makes me wonder why I'm not paid more if this is any indication of my competition.

-kaht

...looks like you don't have a job, so why don't you get out there and feed Tina.

 

[mmerlinn]

random:

You are running into a rounding issue which should be solveable by using checkai's solution.

For more info on the rounding issue itself, see this thread:

http://www.tek-tips.com/viewthread.cfm?qid=531793&page=1

mmerlinn

 

[randomhero69]

Thanks to all of you, you helped me a lot on that case! Thanks again