<limits.h> Implementation-Defined Limits

The header file limits.h consists of macros that define the minimum and maximum values of integer types. Each of these macros can be used in #if preprocessing directives.

Table 1. Declarations Provided by <limits.h>
Macro Name	Description	Value
`CHAR_BIT`	Number of bits to represent type `char`	8
`CHAR_MAX`	Maximum value of a `char`	127
`CHAR_MIN`	Minimum value of a `char`	-128
`INT_MAX`	Maximum value of a `int`	32767
`INT_MIN`	Minimum value of a `int`	-32768
`LLONG_MAX`	Maximum value of a `long long int`	9223372036854775807
`LLONG_MIN`	Minimum value of a `long long int`	-9223372036854775808
`LONG_MAX`	Maximum value of a `long int`	2147483647
`LONG_MIN`	Minimum value of a `long int`	-2147483648
`MB_LEN_MAX`	Maximum number of bytes in a multibyte character	1
`SCHAR_MAX`	Maximum value of a `signed char`	127
`SCHAR_MIN`	Minimum value of a `signed char`	-128
`SHRT_MAX`	Maximum value of a `short int`	32767
`SHRT_MIN`	Minimum value of a `short int`	-32768
`UCHAR_MAX`	Maximum value of an `unsigned char`	255
`UINT_MAX`	Maximum value of an `unsigned int`	65535
`ULLONG_MAX`	Maximum value of a `long long unsigned int`	18446744073709551615
`ULONG_MAX`	Maximum value of a `long unsigned int`	4294967295
`USHRT_MAX`	Maximum value of an `unsigned short int`	65535