On Fri, Nov 15, 2019 at 4:04 AM <awesomecr...@gmail.com> wrote:
>
> Does decimal make this:
> 4.1 + 0.1
> produce 4.2 instead of 4.19999999999998?
The decimal module means that Decimal("4.1") is equal to 41/10 rather
than 2308094809027379/562949953421312, and Decimal("0.1") is equal to
1/10 rather than 3602879701896397/36028797018963968. But in your
source code, if you type 4.1, you are asking for the floating-point
value 2308094809027379/562949953421312, just as if you say "hello" you
are asking for a Unicode string containing those five characters/code
points.
The problem here is not with addition, but with whether or not you
have the number you think you do. So to get a different result, you
have to start with different values.
ChrisA
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