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fix sign error (#2933)

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The exponent range is -1075 - 970, not 1075 - 970.
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Bill Wagner 2019-11-05 10:18:57 -05:00 committed by GitHub
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spec/types.md
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@ -188,7 +188,7 @@ C# supports two floating point types: `float` and `double`. The `float` and `dou
* Positive zero and negative zero. In most situations, positive zero and negative zero behave identically as the simple value zero, but certain operations distinguish between the two ([Division operator](expressions.md#division-operator)).
* Positive infinity and negative infinity. Infinities are produced by such operations as dividing a non-zero number by zero. For example, `1.0 / 0.0` yields positive infinity, and `-1.0 / 0.0` yields negative infinity.
* The ***Not-a-Number*** value, often abbreviated NaN. NaNs are produced by invalid floating-point operations, such as dividing zero by zero.
* The finite set of non-zero values of the form `s * m * 2^e`, where `s` is 1 or -1, and `m` and `e` are determined by the particular floating-point type: For `float`, `0 < m < 2^24` and `-149 <= e <= 104`, and for `double`, `0 < m < 2^53` and `1075 <= e <= 970`. Denormalized floating-point numbers are considered valid non-zero values.
* The finite set of non-zero values of the form `s * m * 2^e`, where `s` is 1 or -1, and `m` and `e` are determined by the particular floating-point type: For `float`, `0 < m < 2^24` and `-149 <= e <= 104`, and for `double`, `0 < m < 2^53` and `-1075 <= e <= 970`. Denormalized floating-point numbers are considered valid non-zero values.
The `float` type can represent values ranging from approximately `1.5 * 10^-45` to `3.4 * 10^38` with a precision of 7 digits.