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GH-100425: Improve accuracy of builtin sum() for float inputs (GH-100426)

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Raymond Hettinger 2022-12-23 14:35:58 -08:00 • committed by GitHub
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Doc/tutorial/floatingpoint.rst
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@ -192,7 +192,7 @@ added onto a running total. That can make a difference in overall accuracy
so that the errors do not accumulate to the point where they affect the
final total:
>>> sum([0.1] * 10) == 1.0
>>> 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 == 1.0
False
>>> math.fsum([0.1] * 10) == 1.0
True