Hello! I am currently making my way through the documentation, and I was wondering why the floating point division operator doesn’t throw the same errors as the integer division function. In the documentation, it says: " Integer division (the div function) has two exceptional cases: dividing by …

The behavior of 1/0 seems clear to me by the IEEE 754 standard. However, I still don’t see why typemin(Int64)/-1 should produce a floating point value rather than throw an exception.

As far as I can tell it produces the correct answer, so the behaviour makes sense: julia> m = typemin(Int64) -9223372036854775808 julia> (m/-1) == big(m)/big(-1) true

Because the value can be represented using Float64, where it can’t using Int64.

[image] hjohnston7: Why don’t these same errors get thrown when I do floating point division with the ‘/’ operator? This was also discussed recently in another thread: Division by zero runs without warning -> complicates finding bugs - #2 by stevengj

This is the oddest thread. The question was asked six years ago, then it was first responded to today.

[image] BioTurboNick: This is the oddest thread. The question was asked six years ago, then it was first responded to today. Yes, I didn’t notice that @Guillermo_C was necroposting on an ancient thread… [image] Guillermo_C: I still don’t see why typemin(Int64)/-1 should produce a floatin…

Why don't integer division errors occur in floating point division?

New to Julia

stevengj June 3, 2024, 2:06pm 6

This was also discussed recently in another thread: Division by zero runs without warning -> complicates finding bugs - #2 by stevengj

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Why don't integer division errors occur in floating point division?

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