Limits.h

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C Standard Library headers
C++ Standard Library headers
assert.h
complex.h
ctype.h
errno.h
fenv.h
float.h
inttypes.h
iso646.h
limits.h
locale.h
math.h
setjmp.h
signal.h
stdarg.h
stdbool.h
stddef.h
stdint.h
stdio.h
stdlib.h
string.h
tgmath.h
time.h
wchar.h
wctype.h

The correct title of this article is limits.h. The initial letter is shown capitalized due to technical restrictions.

limits.h is the header of the general purpose standard library of C programming language which includes definitions of the characteristics of variable types. The values are implementation specific, but may not be of lower magnitude than certain specified values in a conforming C implementation.

1 Member constants
2 See also
3 External Links
4 References

[edit] Member constants

Name	Description	Minimum value*
`CHAR_BIT`	Number of bits in a byte	+8
`SCHAR_MIN`	Minimum value for a signed char	-127
`SCHAR_MAX`	Maximum value for a signed char	+127
`UCHAR_MAX`	Maximum value for an unsigned char	+255
`CHAR_MIN`	Minimum value for a char	-127 (if `char` is represented as a `signed char`; otherwise 0)
`CHAR_MAX`	Minimum value for a char	+127 (if `char` is represented as a `signed char`; otherwise +255)
`MB_LEN_MAX`	Maximum number of bytes in a multibyte character	+1
`SHRT_MIN`	Minimum value for a short int	-32,767
`SHRT_MAX`	Maximum value for a short int	+32,767
`USHRT_MAX`	Maximum value for an unsigned short int	+65,535
`INT_MIN`	Minimum value for an int	-32,767
`INT_MAX`	Maximum value for an int	+32,767
`UINT_MAX`	Maximum value for an unsigned int	+65,535
`LONG_MIN`	Minimum value for a long int	-2,147,483,647
`LONG_MAX`	Maximum value for a long int	+2,147,483,647
`ULONG_MAX`	Maximum value for an unsigned long int	+4,294,967,295
`LLONG_MIN`	Minimum value for a long long int	-9,223,372,036,854,775,807
`LLONG_MAX`	Maximum value for a long long int	+9,223,372,036,854,775,807
`ULLONG_MAX`	Maximum value for an unsigned long long int	+18,446,744,073,709,551,615

*Notes on minimum value: The magnitude of this column is the minimum magnitude for this constant. Negative values represent the minimum value representable in one's complement and sign-magnitude forms. Most implementations use a two's complement representation, in which case the minimum value will be one less (for example, INT_MAX may be +32767 while INT_MIN is -32768).