| title | Values | Microsoft Docs | |
|---|---|---|
| ms.custom | ||
| ms.date | 11/04/2016 | |
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| ms.suite | ||
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| ms.tgt_pltfrm | ||
| ms.topic | article | |
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| ms.assetid | 24003f89-220f-4f93-be7a-b650c26157d7 | |
| caps.latest.revision | 9 | |
| author | mikeblome | |
| ms.author | mblome | |
| manager | ghogen |
ANSI 3.1.2.5 The representations and sets of values of the various types of floating-point numbers
The float type contains 32 bits: 1 for the sign, 8 for the exponent, and 23 for the mantissa. Its range is +/- 3.4E38 with at least 7 digits of precision.
The double type contains 64 bits: 1 for the sign, 11 for the exponent, and 52 for the mantissa. Its range is +/- 1.7E308 with at least 15 digits of precision.
The long double type contains 80 bits: 1 for the sign, 15 for the exponent, and 64 for the mantissa. Its range is +/- 1.2E4932 with at least 19 digits of precision. Note that with the Microsoft C compiler, the representation of type long double is identical to type double.