832727 - Math Error in substraction

Status: RESOLVED DUPLICATE of bug 5856

(Core :: JavaScript Engine, defect)

Description

[Michael Mortchelewicz]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0
Build ID: 20130104151925

Steps to reproduce:

In javascript i did: 34.44-0.1 and 34.64-0.1 


Actual results:

The result of 34.44-0.1 was 34.339999999999996
The result of 34.64-0.1 was 34.54


Expected results:

it should display 34.34 as in the second operation

Comment 1

[Andre Klapper]

Please provide/attach a minimal testcase (=code) here.

Comment 2

[Michael Mortchelewicz]

<script type="text/javascript">
console.log(34.44-0.1); //display 34.339999999999996 in console instead of 34.34
console.log(34.64-0.1); //display 34.54 in console as needed
</script>

Comment 3

[Andre Klapper]

Please attach a full testcase (your four lines of code are not a valid HTML file) and provide complete steps how to reproduce to actually see your results (opening web console or whatever). 
Copying that into a file and loading it obviously shows nothing.

Comment 4

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Andre, thanks; I managed to reproduce with Michael's script. Note that the output is in the Web Console, not on the page.

However, the result you get is the expected result with IEEE doubles, afaict.