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Colin Robertson
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Fix formatting of fp manifest constants
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‎docs/cpp/floating-limits.md‎

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---
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title: "Floating Limits | Microsoft Docs"
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ms.custom: ""
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ms.date: "11/04/2016"
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ms.date: "08/03/2018"
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ms.technology: ["cpp-language"]
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ms.topic: "language-reference"
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dev_langs: ["C++"]
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ms.workload: ["cplusplus"]
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---
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# Floating Limits
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**Microsoft Specific**
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The following table lists the limits on the values of floating-point constants. These limits are also defined in the standard header file \<float.h>.
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### Limits on Floating-Point Constants
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|Constant|Meaning|Value|
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|--------------|-------------|-----------|
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|FLT_DIG DBL_DIG LDBL_DIG|Number of digits, q, such that a floating-point number with q decimal digits can be rounded into a floating-point representation and back without loss of precision.|6 15 15|
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|FLT_EPSILON DBL_EPSILON LDBL_EPSILON|Smallest positive number x, such that x + 1.0 is not equal to 1.0.|1.192092896e-07F 2.2204460492503131e-016 2.2204460492503131e-016|
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|FLT_GUARD||0|
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|FLT_MANT_DIG DBL_MANT_DIG LDBL_MANT_DIG|Number of digits in the radix specified by FLT_RADIX in the floating-point significand. The radix is 2; hence these values specify bits.|24 53 53|
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|FLT_MAX DBL_MAX LDBL_MAX|Maximum representable floating-point number.|3.402823466e+38F 1.7976931348623158e+308 1.7976931348623158e+308|
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|FLT_MAX_10_EXP DBL_MAX_10_EXP LDBL_MAX_10_EXP|Maximum integer such that 10 raised to that number is a representable floating-point number.|38 308 308|
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|FLT_MAX_EXP DBL_MAX_EXP LDBL_MAX_EXP|Maximum integer such that FLT_RADIX raised to that number is a representable floating- point number.|128 1024 1024|
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|FLT_MIN DBL_MIN LDBL_MIN|Minimum positive value.|1.175494351e-38F 2.2250738585072014e-308 2.2250738585072014e-308|
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|FLT_MIN_10_EXP DBL_MIN_10_EXP LDBL_MIN_10_EXP|Minimum negative integer such that 10 raised to that number is a representable floating- point number.|-37<br /><br /> -307<br /><br /> -307|
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|FLT_MIN_EXP DBL_MIN_EXP LDBL_MIN_EXP|Minimum negative integer such that FLT_RADIX raised to that number is a representable floating-point number.|-125<br /><br /> -1021<br /><br /> -1021|
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|FLT_NORMALIZE||0|
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|FLT_RADIX _DBL_RADIX _LDBL_RADIX|Radix of exponent representation.|2 2 2|
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|FLT_ROUNDS _DBL_ROUNDS _LDBL_ROUNDS|Rounding mode for floating-point addition.|1 (near) 1 (near) 1 (near)|
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**Microsoft Specific**
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The following table lists the limits on the values of floating-point constants. These limits are also defined in the standard header file \<float.h>.
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## Limits on Floating-Point Constants
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|Constant|Meaning|Value|
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|--------------|-------------|-----------|
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|`FLT_DIG`<br/>`DBL_DIG`<br/>`LDBL_DIG`|Number of digits, q, such that a floating-point number with q decimal digits can be rounded into a floating-point representation and back without loss of precision.|6<br/>15<br/>15|
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|`FLT_EPSILON`<br/>`DBL_EPSILON`<br/>`LDBL_EPSILON`|Smallest positive number x, such that x + 1.0 is not equal to 1.0.|1.192092896e-07F<br/>2.2204460492503131e-016<br/>2.2204460492503131e-016|
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|`FLT_GUARD`||0|
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|`FLT_MANT_DIG`<br/>`DBL_MANT_DIG`<br/>`LDBL_MANT_DIG`|Number of digits in the radix specified by `FLT_RADIX` in the floating-point significand. The radix is 2; hence these values specify bits.|24<br/>53<br/>53|
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|`FLT_MAX`<br/>`DBL_MAX`<br/>`LDBL_MAX`|Maximum representable floating-point number.|3.402823466e+38F<br/>1.7976931348623158e+308<br/>1.7976931348623158e+308|
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|`FLT_MAX_10_EXP`<br/>`DBL_MAX_10_EXP`<br/>`LDBL_MAX_10_EXP`|Maximum integer such that 10 raised to that number is a representable floating-point number.|38<br/>308<br/>308|
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|`FLT_MAX_EXP`<br/>`DBL_MAX_EXP`<br/>`LDBL_MAX_EXP`|Maximum integer such that `FLT_RADIX` raised to that number is a representable floating- point number.|128<br/>1024<br/>1024|
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|`FLT_MIN`<br/>`DBL_MIN`<br/>`LDBL_MIN`|Minimum positive value.|1.175494351e-38F<br/>2.2250738585072014e-308<br/>2.2250738585072014e-308|
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|`FLT_MIN_10_EXP`<br/>`DBL_MIN_10_EXP`<br/>`LDBL_MIN_10_EXP`|Minimum negative integer such that 10 raised to that number is a representable floating- point number.|-37<br/>-307<br/>-307|
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|`FLT_MIN_EXP`<br/>`DBL_MIN_EXP`<br/>`LDBL_MIN_EXP`|Minimum negative integer such that `FLT_RADIX` raised to that number is a representable floating-point number.|-125<br/>-1021<br/>-1021|
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|`FLT_NORMALIZE`||0|
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|`FLT_RADIX`<br/>`_DBL_RADIX`<br/>`_LDBL_RADIX`|Radix of exponent representation.|2<br/>2<br/>2|
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|`FLT_ROUNDS`<br/>`_DBL_ROUNDS`<br/>`_LDBL_ROUNDS`|Rounding mode for floating-point addition.|1 (near)<br/>1 (near)<br/>1 (near)|
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> [!NOTE]
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> The information in the table may differ in future versions of the product.
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**END Microsoft Specific**
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## See also
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[Integer Limits](../cpp/integer-limits.md)
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> The information in the table may differ in future versions of the product.
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**END Microsoft Specific**
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## See also
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[Integer Limits](../cpp/integer-limits.md)

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