## Limits on Integer Constants

Constant | Meaning | Value |
---|---|---|

CHAR_BIT |
Number of bits in the smallest variable that is not a bit field. | 8 |

SCHAR_MIN |
Minimum value for a variable of type signed char. |
–128 |

SCHAR_MAX |
Maximum value for a variable of type signed char. |
127 |

UCHAR_MAX |
Maximum value for a variable of type `unsigned char` . |
255 (0xff) |

CHAR_MIN |
Minimum value for a variable of type `char` . |
–128; 0 if /J option used |

CHAR_MAX |
Maximum value for a variable of type `char` . |
127; 255 if /J option used |

MB_LEN_MAX |
Maximum number of bytes in a multicharacter constant. | 5 |

SHRT_MIN |
Minimum value for a variable of type short. |
–32768 |

SHRT_MAX |
Maximum value for a variable of type short. |
32767 |

USHRT_MAX |
Maximum value for a variable of type unsigned short. |
65535 (0xffff) |

INT_MIN |
Minimum value for a variable of type `int` . |
–2147483648 |

INT_MAX |
Maximum value for a variable of type `int` . |
2147483647 |

UINT_MAX |
Maximum value for a variable of type `unsigned int` . |
4294967295 (0xffffffff) |

LONG_MIN |
Minimum value for a variable of type long. |
–2147483648 |

LONG_MAX |
Maximum value for a variable of type long. |
2147483647 |

ULONG_MAX |
Maximum value for a variable of type `unsigned long` . |
4294967295 (0xffffffff) |

_I64_MIN |
Minimum value for a variable of type `__int64` |
-9223372036854775808 |

_I64_MAX |
Maximum value for a variable of type `__int64` |
9223372036854775807 |

_UI64_MAX |
Maximum value for a variable of type unsigned __int64 |
18446744073709551615 (0xffffffffffffffff) |

## Limits on Floating-Point Constants

Constant | Meaning | Value |
---|---|---|

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 |

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 |

FLT_GUARD | 0 | |

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 |

FLT_MAX DBL_MAX LDBL_MAX | Maximum representable floating-point number. | 3.402823466e+38F 1.7976931348623158e+308 1.7976931348623158e+308 |

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 |

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 |

FLT_MIN DBL_MIN LDBL_MIN | Minimum positive value. | 1.175494351e–38F 2.2250738585072014e–308 2.2250738585072014e–308 |

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
–307 –307 |

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
–1021 –1021 |

FLT_NORMALIZE | 0 | |

FLT_RADIX _DBL_RADIX _LDBL_RADIX | Radix of exponent representation. | 2 2 2 |

FLT_ROUNDS _DBL_ROUNDS _LDBL_ROUNDS | Rounding mode for floating-point addition. | 1 (near) 1 (near) 1 (near) |