◄Up► ◄Contents► ◄Index► ◄Back► ─────Run-Time Library─────────────────────────────────────────────────────── Constant: Range limits for data types Context: Used to specify the ranges of C data types. Summary: The implementation-dependent ranges of values allowed for C data types. The constants listed below give the ranges for the integral data types and are defined in LIMITS.H: Constant Value Meaning SCHAR_MAX 127 Maximum signed char value SCHAR_MIN -127 Minimum signed char value UCHAR_MAX 255 Maximum unsigned char value CHAR_BIT 8 Number of bits in a char USHRT_MAX 0xffff Maximum unsigned short value SHRT_MAX 32767 Maximum (signed) short value SHRT_MIN -32767 Minimum (signed) short value UINT_MAX 0xffff Maximum unsigned int value ULONG_MAX 0xffffffff Maximum unsigned long value INT_MAX 32767 Maximum (signed) int value INT_MIN -32767 Minimum (signed) int value LONG_MAX 2147483647 Maximum (signed) long value LONG_MIN -2147483647 Minimum (signed) long value CHAR_MAX 127 Maximum char value CHAR_MIN -127 Minimum char value MB_LEN_MAX 2 Maximum number of bytes in multibyte char NOTE: The /J compiler option changes the default char type to unsigned, with the following limits: CHAR_MAX 255 Maximum char value CHAR_MIN 0 Minimum char value The constants listed below give the range and other characteristics of the double, float, and long double 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 Max. value DBL_MAX_10_EXP 308 Max. decimal exponent DBL_MAX_EXP 1024 Max. binary exponent DBL_MIN 2.2250738585072014e-308 Min. positive value DBL_MIN_10_EXP (-307) Min. decimal exponent DBL_MIN_EXP (-1021) Min. binary exponent _DBL_RADIX 2 Exponent radix _DBL_ROUNDS 1 Addition rounding: near FLT_DIG 7 # of decimal digits of precision FLT_EPSILON 1.192092896e-07 Smallest such that 1.0+FLT_EPSILON !=1.0 FLT_GUARD 0 FLT_MANT_DIG 24 # of bits in mantissa FLT_MAX 3.402823466e+38 Max. value FLT_MAX_10_EXP 38 Max. decimal exponent FLT_MAX_EXP 128 Max. binary exponent FLT_MIN 1.175494351e-38 Min. positive value FLT_MIN_10_EXP (-37) Min. decimal exponent FLT_MIN_EXP (-125) Min. binary exponent FLT_NORMALIZE 0 FLT_RADIX 2 Exponent radix FLT_ROUNDS 1 Addition rounding: near LDBL_DIG 19 # of decimal digits of precision LDBL_EPSILON 5.4210108624275221706e-020 Smallest such that 1.0+LDBL_EPSILON !=1.0 LDBL_MANT_DIG 64 # of bits in mantissa LDBL_MAX 1.189731495357231765e+4932L Max. value LDBL_MAX_10_EXP 4932 Max. decimal exponent LDBL_MAX_EXP 16384 Max. binary exponent LDBL_MIN 3.3621031431120935063e-4932L Min. positive value LDBL_MIN_10_EXP (-4931) Min. decimal exponent LDBL_MIN_EXP (-16381) Min. binary exponent _LDBL_RADIX 2 Exponent radix _LDBL_ROUNDS 1 Addition rounding: near -♦-