# Numeric limits

From cppreference.com

Defined in header
`<stdint.h>` | |

PTRDIFF_MIN (C99) |
minimum value of object of ptrdiff_t type (macro constant) |

PTRDIFF_MAX (C99) |
maximum value of object of ptrdiff_t type (macro constant) |

SIZE_MAX (C99) |
maximum value of object of size_t type (macro constant) |

SIG_ATOMIC_MIN (C99) |
maximum value of object of sig_atomic_t type (macro constant) |

SIG_ATOMIC_MAX (C99) |
maximum value of object of sig_atomic_t type (macro constant) |

WCHAR_MIN (C99) |
maximum value of object of wchar_t type (macro constant) |

WCHAR_MAX (C99) |
maximum value of object of wchar_t type (macro constant) |

WINT_MIN (C99) |
maximum value of object of wint_t type (macro constant) |

WINT_MAX (C99) |
maximum value of object of wint_t type (macro constant) |

### Limits of integer types

Defined in header
`<limits.h>` | |

CHAR_BIT |
number of bits in byte (macro constant) |

MB_LEN_MAX |
maximum number of bytes in a multibyte character (macro constant) |

CHAR_MIN |
minimum value of char (macro constant) |

CHAR_MAX |
maximum value of char (macro constant) |

SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN (C99) |
minimum value of signed char, short, int, long and long long respectively (macro constant) |

SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX (C99) |
maximum value of signed char, short, int, long and long long respectively (macro constant) |

UCHAR_MAXUSHRT_MAXUINT_MAXULONG_MAXULLONG_MAX (C99) |
maximum value of unsigned char, unsigned short, unsigned int, unsigned long and unsigned long long respectively (macro constant) |

### Limits of floating point types

Defined in header
`<float.h>` | |

FLT_RADIX |
the radix (integer base) used by the representation of all three floating-point types (macro constant) |

DECIMAL_DIG (C99) |
number of decimal digits that can be converted to long double and back without losing precision (macro constant) |

FLT_MINDBL_MINLDBL_MIN |
minimum value of float, double and long double respectively (macro constant) |

FLT_MAXDBL_MAXLDBL_MAX |
maximum value of float, double and long double respectively (macro constant) |

FLT_EPSILONDBL_EPSILONLDBL_EPSILON |
difference between 1.0 and the next representable value for float, double and long double respectively (macro constant) |

FLT_DIGDBL_DIGLDBL_DIG |
number of decimal digits that can be represented without losing precision for float, double and long double respectively (macro constant) |

FLT_MANT_DIGDBL_MANT_DIGLDBL_MANT_DIG |
number of base `FLT_RADIX` digits that can be represented without losing precision for float, double and long double respectively (macro constant) |

FLT_MIN_EXPDBL_MIN_EXPLDBL_MIN_EXP |
minimum negative integer such that `FLT_RADIX` raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |

FLT_MIN_10_EXPDBL_MIN_10_EXPLDBL_MIN_10_EXP |
minimum negative integer such that 10 raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |

FLT_MAX_EXPDBL_MAX_EXPLDBL_MAX_EXP |
maximum positive integer such that `FLT_RADIX` raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |

FLT_MAX_10_EXPDBL_MAX_10_EXPLDBL_MAX_10_EXP |
maximum positive integer such that 10 raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |

FLT_ROUNDS |
rounding mode of floating-point arithmetics, equal to float_round_style (macro constant) |

FLT_EVAL_METHOD (C99) |
use of extended precision for intermediate results: 0 not used, 1 double is used instead of float, 2: long double is used (macro constant) |

FLT_HAS_SUBNORMDBL_HAS_SUBNORMLDBL_HAS_SUBNORM (C11) |
whether the type supports subnormal (denormal) numbers: -1 indeterminable, 0 absent, 1 present (macro constant) |