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Koan about rounding pitfalls #268

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Goutte opened this issue Oct 17, 2021 · 1 comment
Open

Koan about rounding pitfalls #268

Goutte opened this issue Oct 17, 2021 · 1 comment

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@Goutte
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Goutte commented Oct 17, 2021

I love these koans !

Is it relevant to drop a word of caution regarding rounding?

  koan "But beware of floating dragons" do
    assert Float.round(2.675, 2) == ___
  end
@iamvery
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iamvery commented Jul 14, 2024

Sure! Open a PR 😎

Goutte added a commit to Goutte/elixir-koans that referenced this issue Jul 15, 2024
@Goutte
feat(koan): add a koan about rounding pitfalls
0436be0 
The solution is 2.67

This is because 2.675 is actually approximated in IEE754:
2.67499999999999982236431605997495353221893310546875

Close, but no cigar.

Fixes elixirkoans#268

/spend 30m
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@iamvery @Goutte