8000 Misc improvements to the float tutorial by rhettinger · Pull Request #102052 · python/cpython · GitHub
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Misc improvements to the float tutorial #102052

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Merged
merged 10 commits into from
Feb 19, 2023
Merged

Misc improvements to the float tutorial #102052

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1e2ec34
Example is more intelligible without the leading zeros
rhettinger Feb 19, 2023
082d7a8
Leading zeros are easier to read and match the surrounding text.
rhettinger Feb 19, 2023
2ff520d
Compare sum() to straight addition and to math.fsum()
rhettinger Feb 19, 2023
22e1a96
Show math.isclose() for comparing inexact values
rhettinger Feb 19, 2023
cb1f78a
Add doctests throughout
rhettinger Feb 19, 2023
e9e959a
Add a more useful example of round() for comparisons
rhettinger Feb 19, 2023
8f02dc5
Shorter example
rhettinger Feb 19, 2023
d8bcc4c
Fix doctests: Missing import and counterfactual example.
rhettinger Feb 19, 2023
cd8abc5
Compare sum() and fsum() with straight addition
rhettinger Feb 19, 2023
d6a6b6b
Add section author
rhettinger Feb 19, 2023
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Example is more intelligible without the leading zeros
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@rhettinger
rhettinger committed Feb 19, 2023
commit 1e2ec34a57e65a4a34e719509b4ea0ddd9ee3aca
6 changes: 3 additions & 3 deletions Doc/tutorial/floatingpoint.rst
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Expand Up @@ -12,9 +12,9 @@ Floating Point Arithmetic: Issues and Limitations


Floating-point numbers are represented in computer hardware as base 2 (binary)
fractions. For example, the **decimal** fraction ``0.125``
has value 1/10 + 2/100 + 5/1000, and in the same way the **binary** fraction ``0.001``
has value 0/2 + 0/4 + 1/8. These two fractions have identical values, the only
fractions. For example, the **decimal** fraction ``0.625``
has value 6/10 + 2/100 + 5/1000, and in the same way the **binary** fraction ``0.101``
has value 1/2 + 0/4 + 1/8. These two fractions have identical values, the only
real difference being that the first is written in base 10 fractional notation,
and the second in base 2.

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