A weird problem with floating point ?

tzecheung · June 24th, 2003, 11:23 AM

Hi, i met a very weird problem.
May be some know why!

Here is a example of the bug:

<html><head></head><body>

<script language='javascript'>

var v1=1.65; var v2=1.32;

alert(v1+v2);

</script>

</body></html>

When i execute this page, i get the following result : 2.9699999999999997

What 's happen ?

pgtips · June 25th, 2003, 06:32 AM

Its because computers work in binary! Decimal numbers cannot always be converted precisely into a binary equivalent. This results in a lack of precision when using floating point numbers.