[issue41920] Weird add operation of "0.2222 + 0.1111"

2020-10-03 Thread Leonard Schwennesen 


New submission from Leonard Schwennesen :

If I add 0. + 0. in the python cli I get the value 0.4 
and not 0.. Also the other way around.
But if I enter for example 0.2+0.1 I get 0.3 so that's right.
Here are a few examples I tested that working properly:

>>> 0.22+0.11
0.33
>>> 0.222+0.111
0.333
>>> 0.2+0.1
0.3
>>> 0.+0.
1.111
>>> 0.+0.
0.
>>> 0.+0.
0.
>>> 0.+0.
0.
>>> 0.+0.
0.

Python 3.8.5
[GCC 10.2.0] on linux

I also tested that in a newly setup VM, same issue

--
messages: 377871
nosy: ungedummt
priority: normal
severity: normal
status: open
title: Weird add operation of "0. + 0."
type: behavior
versions: Python 3.8

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[issue41920] Weird add operation of "0.2222 + 0.1111"

2020-10-03 Thread Leonard Schwennesen 


Leonard Schwennesen  added the comment:

Same problem with 0.-0. python returns 0.22218 and not 
0.

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[issue41920] Weird add operation of "0.2222 + 0.1111"

2020-10-03 Thread Leonard Schwennesen 


Leonard Schwennesen  added the comment:

Ok thank you for these resources. I didn't know that before. (;

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[issue41920] Weird add operation of "0.2222 + 0.1111"

2020-10-03 Thread Leonard Schwennesen 


Leonard Schwennesen  added the comment:

But this "bug" only affects floating numbers?

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[issue41920] Weird add operation of "0.2222 + 0.1111"

2020-10-06 Thread Leonard Schwennesen 


Leonard Schwennesen  added the comment:

Hi Steven,
Thanks for your detailed explanations. They where very helpful for me. Now I 
know a bit more about Python and Computers in general. (;

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