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Well, infinity is totally representable with IEEE 754 floats. For example 1.0/0.0 == +inf, -1.0/0.0 == -inf, but 0.0/0.0 == NaN.
by Sharlin 2y ago
Well, infinity is totally representable with IEEE 754 floats. For example 1.0/0.0 == +inf, -1.0/0.0 == -inf, but 0.0/0.0 == NaN.
- amelius 2y agoA smart compiler should be able to figure out a better value for 0/0, depending on context. For example: for i in range(0, 10): print(i/0.0) In this case it should probably print +inf when i == 0. But: for i in range(-10, 10): print(i/0.0) Now it is not clear, but at least we know it's an infinity so perhaps we need a special value +-inf. And: for i in range(-10, 10): print(i/i) In this case, the value for 0/0 can be 1.
- Sharlin 2y agoWell, it could, but that would be against the spec. The hardware implements IEEE 754, most languages guarantee IEEE 754, and transforming code so that 0.0/0.0 doesn't result in NaN would be invalid.