I have a form form1 where user enters two values input1 and input2.
Then a function addValues () is called:
function addValues()
{
var var1 = parseFloat(docu ment.form1.inpu t1.value)
var var2 = parseFloat(docu ment.form1.inpu t2.value)
document.form1. output.value = var1 + var2
}
When I enter 4.0001 and 1.0001 the result in my script is not 5.0002 but
5.0001999999999 995
Of course this is sufficiently precise in most uses, or can be rounded off.
Still I have seen no other language where rounding errors are so prominent
after one simple addition.
Are these errors a result of parseFloat() ? Am I missing something crucial ?
Is there an easy way to increase the precision ?
TIA
Pjotr
1  1193 
On Sun, 7 Nov 2004 12:50:00 +0100, Pjotr Wedersteers wrote: When I enter 4.0001 and 1.0001 the result in my script is not 5.0002 but
5.0001999999999 995
<http://www.jibbering.c om/faq/#FAQ4_7>
Of course this is sufficiently precise in most uses, or can be rounded off.
Still I have seen no other language where rounding errors are so prominent
after one simple addition.
Like what languages?
Here's the result for Java..
value1: 4.0001
value2: 1.0001
value1 + 2: 5.0001999999999 995
Are these errors a result of parseFloat() ? Am I missing something crucial ?
See the link above.
--
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