math - Float sum with javascript

I'm
calculating the sum of several float values using javascript and... I've noticed a
strange thing never seen before. Executing this
code:

parseFloat('2.3') +
            parseFloat('2.4')

I
obtain
4.699999999999999

So...
what sould I do to obtain a correct value? (supposed that this is
incorrect...)

itemprop="text">

class="normal">Answer

Once you
read what href="http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html">What
Every Computer Scientist Should Know About Floating-Point
Arithmetic you could use the href="https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Number/toFixed">.toFixed()
function:

var result =
            parseFloat('2.3') +
            parseFloat('2.4');
alert(result.toFixed(2));​