[New-bugs-announce] [issue41269] Wrong subtraction calculations

Ivan report at bugs.python.org
Fri Jul 10 09:43:09 EDT 2020


New submission from Ivan <ivan.babic.zg at gmail.com>:

I've started to learn python and tried command:
print(-2.989 + 2)
it gives me result of -0.9889999999999999
same error can be observed with numbers from 4 and below like:
print(-2.989 + 4)
1.0110000000000001

print(-2.989 + 3)
0.01100000000000012

print(-2.989 + 1)
-1.9889999999999999

Numbers above 4 seam to work fine

----------
components: Windows
files: python error.jpg
messages: 373465
nosy: Svabo, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Wrong subtraction calculations
type: behavior
versions: Python 3.8
Added file: https://bugs.python.org/file49313/python error.jpg

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41269>
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