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Beef up the rationale a bit, as per Konrad Hinsen's request.

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Moshe Zadka 2001-03-21 18:40:28 +00:00
parent fdd5b0e759
commit 8e525837c0
1 changed files with 7 additions and 3 deletions
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pep-0240.txt
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@ -19,10 +19,14 @@ Abstract
Rationale
Rational numbers are useful, and are much harder to use without
literals. Making the "obvious" non-integer type one with more
Rational numbers are useful for exact and unsurprising arithmetic.
They give the correct results people have been taught in various
math classes. Making the "obvious" non-integer type one with more
predictable semantics will surprise new programmers less then
using floating point numbers.
using floating point numbers. As quite a few posts on c.l.py and
on tutor@python.org have shown, people often get bit by strange
semantics of floating point numbers: for example, round(0.98, 2)
still gives 0.97999999999999998.
Proposal