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Numeric limits

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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_MIN
SHRT_MIN
INT_MIN
LONG_MIN
LLONG_MIN
(C99)
minimum value of signed char, short, int, long and long long respectively
(macro constant)
SCHAR_MAX
SHRT_MAX
INT_MAX
LONG_MAX
LLONG_MAX
(C99)
maximum value of signed char, short, int, long and long long respectively
(macro constant)
UCHAR_MAX
USHRT_MAX
UINT_MAX
ULONG_MAX
ULLONG_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_MIN
DBL_MIN
LDBL_MIN
minimum value of float, double and long double respectively
(macro constant)
FLT_MAX
DBL_MAX
LDBL_MAX
maximum value of float, double and long double respectively
(macro constant)
FLT_EPSILON
DBL_EPSILON
LDBL_EPSILON
difference between 1.0 and the next representable value for float, double and long double respectively
(macro constant)
FLT_DIG
DBL_DIG
LDBL_DIG
number of decimal digits that can be represented without losing precision for float, double and long double respectively
(macro constant)
FLT_MANT_DIG
DBL_MANT_DIG
LDBL_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_EXP
DBL_MIN_EXP
LDBL_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_EXP
DBL_MIN_10_EXP
LDBL_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_EXP
DBL_MAX_EXP
LDBL_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_EXP
DBL_MAX_10_EXP
LDBL_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)