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by ggggtez 2869 days ago
No, you are assuming that 1/0= "undefined" where "undefined" is a magical value. It's not. It literally means 'That operation has no definition, and there is no reasonable result to return'.

Many languages handle this in a practical way by creating a special value "undefined", "NaN", or others that has special properties. But let's be clear that "0" is a normal number in the real number space, as so expectations about properties of real numbers are not going to hold up.
1 comments
wan23 2869 days ago
When there is no reasonable result to return does it really matter what result is returned? 1 / 0 == 0 is about the same as 1 / 0 == 3. To avoid this just don't do 1 / 0 in your program.
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lmm 2869 days ago
> 1 / 0 == 0 is about the same as 1 / 0 == 3

Sure, and both are bad.

> To avoid this just don't do 1 / 0 in your program.

If you're going to avoid doing it, better to have it throw an exception if you do it by accident.

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