Terry J. Reedy <[email protected]> added the comment:
To add to Zach's answer:
Please do not mark issues for IDLE just because you use IDLE to send your code
to Python and display the returned string answer. If in any doubt, rerun the
same code directly with Python either interactively or from the command line.
(Note: Windows requires "", not '', on command line.)
C:\Users\Terry>python -c "print(11/3)"
3.6666666666666665
As for the result: 11/3 cannot be exactly represented as a binary (or decimal)
finite-precision floating point number. In this case, the nearest binary float
is less that 11/3. Python prints floats with up to 17 decimal digits. We
can get more with the decimal module.
>>> decimal.Decimal(11/3)
Decimal('3.666666666666666518636930049979127943515777587890625')
We can also check with decimal float literals
>>> 11/3 == 3.6666666666666665)
True
This expression is true for all 18 digit literals from
3.66666666666666630 to
3.66666666666666674
It would have been better to ask about 11/3 on python-list (for instance),
where other beginners could see the answer, rather than here. I will repost my
answer there.
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<https://bugs.python.org/issue36151>
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