Skip to content

data-type-constants.md

Latest commit

 

History

History
173 lines (168 loc) · 5.26 KB

data-type-constants.md

File metadata and controls

173 lines (168 loc) · 5.26 KB
title Data Type Constants | Microsoft Docs
ms.custom
ms.date 11/04/2016
ms.reviewer
ms.suite
ms.technology
cpp-standard-libraries
ms.tgt_pltfrm
ms.topic article
f1_keywords
FLT_MIN
SHRT_MAX
CHAR_MIN
MB_LEN_MAX
DBL_EPSILON
SHRT_MIN
_FLT_RADIX
FLT_DIG
FLT_MAX_10_EXP
FLT_MANT_DIG
DBL_MAX_EXP
SCHAR_MIN
SCHAR_MAX
DBL_MIN
FLT_MIN_10_EXP
_DBL_ROUNDS
USHRT_MAX
FLT_MAX_EXP
LONG_MAX
DBL_MAX
DBL_DIG
FLT_MIN_EXP
INT_MIN
DBL_MIN_10_EXP
CHAR_BIT
INT_MAX
ULONG_MAX
DBL_MIN_EXP
LONG_MIN
_FLT_ROUNDS
DBL_MANT_DIG
_DBL_RADIX
CHAR_MAX
FLT_MAX
DBL_MAX_10_EXP
UCHAR_MAX
FLT_EPSILON
UINT_MAX
dev_langs
C++
helpviewer_keywords
DBL_MAX_EXP constant
_DBL_RADIX constant
FLT_MIN_EXP constant
DBL_EPSILON constant
INT_MIN constant
FLT_EPSILON constant
DBL_MANT_DIG constant
_FLT_RADIX constant
DBL_MIN constant
USHRT_MAX constant
FLT_MAX_10_EXP constant
_FLT_ROUNDS constant
data type constants [C++]
_DBL_ROUNDS constant
CHAR_MAX constant
FLT_MAX_EXP constant
FLT_MIN constant
CHAR_MIN constant
FLT_MIN_10_EXP constant
DBL_MIN_EXP constant
SCHAR_MAX constant
FLT_RADIX constant
CHAR_BIT constant
UCHAR_MAX constant
DBL_RADIX constant
FLT_ROUNDS constant
LONG_MIN constant
SHRT_MAX constant
LONG_MAX constant
DBL_MAX_10_EXP constant
DBL_MIN_10_EXP constant
INT_MAX constant
constants [C++], data type
ULONG_MAX constant
FLT_DIG constant
MB_LEN_MAX constant
DBL_DIG constant
SHRT_MIN constant
DBL_MAX constant
DBL_ROUNDS constant
FLT_MAX constant
UINT_MAX constant
FLT_MANT_DIG constant
SCHAR_MIN constant
ms.assetid c0f1c405-0465-41d5-b5ff-e81cdb6f1622
caps.latest.revision 6
author corob-msft
ms.author corob
manager ghogen
translation.priority.ht
cs-cz
de-de
es-es
fr-fr
it-it
ja-jp
ko-kr
pl-pl
pt-br
ru-ru
tr-tr
zh-cn
zh-tw

Data Type Constants

Data type constants are implementation-dependent ranges of values allowed for integral data types. The constants listed below give the ranges for the integral data types and are defined in LIMITS.H.

Note

The /J compiler option changes the default char type to unsigned.

Constant Value Meaning
SCHAR_MAX 127 Maximum signed char value
SCHAR_MIN -128 Minimum signed char value
UCHAR_MAX 255 (0xff) Maximum unsigned char value
CHAR_BIT 8 Number of bits in a char
USHRT_MAX 65535 (0xffff) Maximum unsigned short value
SHRT_MAX 32767 Maximum (signed) short value
SHRT_MIN -32768 Minimum (signed) short value
UINT_MAX 4294967295 (0xffffffff) Maximum unsigned int value
ULONG_MAX 4294967295 (0xffffffff) Maximum unsigned long value
INT_MAX 2147483647 Maximum (signed) int value
INT_MIN -2147483647-1 Minimum (signed) int value
LONG_MAX 2147483647 Maximum (signed) long value
LONG_MIN -2147483647-1 Minimum (signed) long value
CHAR_MAX 127 (255 if /J option used) Maximum char value
CHAR_MIN -128 (0 if /J option used) Minimum char value
MB_LEN_MAX 2 Maximum number of bytes in multibyte char
_I64_MAX 9223372036854775807 Maximum (signed) __int64 value
_I64_MIN -9223372036854775807-1 Minimum (signed) __int64 value
_UI64_MAX 0xffffffffffffffff Maximum (unsigned) __int64 value

The following constants give the range and other characteristics of the double and float data types, and are defined in FLOAT.H:

Constant Value Description
DBL_DIG 15 # of decimal digits of precision
DBL_EPSILON 2.2204460492503131e-016 Smallest such that 1.0+DBL_EPSILON !=1.0
DBL_MANT_DIG 53 # of bits in mantissa
DBL_MAX 1.7976931348623158e+308 Maximum value
DBL_MAX_10_EXP 308 Maximum decimal exponent
DBL_MAX_EXP 1024 Maximum binary exponent
DBL_MIN 2.2250738585072014e-308 Minimum positive value
DBL_MIN_10_EXP (-307) Minimum decimal exponent
DBL_MIN_EXP (-1021) Minimum binary exponent
_DBL_RADIX 2 Exponent radix
_DBL_ROUNDS 1 Addition rounding: near
FLT_DIG 6 Number of decimal digits of precision
FLT_EPSILON 1.192092896e-07F Smallest such that 1.0+FLT_EPSILON !=1.0
FLT_MANT_DIG 24 Number of bits in mantissa
FLT_MAX 3.402823466e+38F Maximum value
FLT_MAX_10_EXP 38 Maximum decimal exponent
FLT_MAX_EXP 128 Maximum binary exponent
FLT_MIN 1.175494351e-38F Minimum positive value
FLT_MIN_10_EXP (-37) Minimum decimal exponent
FLT_MIN_EXP (-125) Minimum binary exponent
FLT_RADIX 2 Exponent radix
FLT_ROUNDS 1 Addition rounding: near

See Also

Global Constants