2.5 limits.h

The limits header defines the characteristics of variable types.

2.5.1 Defined Values

The following values are defined with the #define directive. These values are implementation-specific, but may not be any lower than what is given here.

CHAR_BIT 8 Number of bits in a byte.

SCHAR_MIN -127 Minimum value for a signed char.

SCHAR_MAX +127 Maximum value for a signed char.

UCHAR_MAX 255 Maximum value for an unsigned char.

CHAR_MIN CHAR_MAX These define the minimum and maximum values for a char. If a char is being represented as a signed integer, then their values are the same as the signed char (SCHAR) values. Otherwise CHAR_MIN is 0 and CHAR_MAX is the same as UCHAR_MAX.

MB_LEN_MAX 1 Maximum number of bytes in a multibyte character.

SHRT_MIN -32767 Minimum value for a short int.

SHRT_MAX +32767 Maximum value for a short int.

USHRT_MAX 65535 Maximum value for an unsigned short int.

INT_MIN -32767 Minimum value for an int.

INT_MAX +32767 Maximum value for an int.

UINT_MAX 65535 Maximum value for an unsigned int.

LONG_MIN -2147483647 Minimum value for a long int.

LONG_MAX +2147483647 Maximum value for a long int.

ULONG_MAX 4294967295 Maximum value for an unsigned long int.

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`CHAR_BIT 8`	Number of bits in a byte.
`SCHAR_MIN -127`	Minimum value for a signed char.
`SCHAR_MAX +127`	Maximum value for a signed char.
`UCHAR_MAX 255`	Maximum value for an unsigned char.
`CHAR_MIN CHAR_MAX`	These define the minimum and maximum values for a char. If a char is being represented as a signed integer, then their values are the same as the signed char (`SCHAR`) values. Otherwise `CHAR_MIN` is 0 and `CHAR_MAX` is the same as `UCHAR_MAX`.
`MB_LEN_MAX 1`	Maximum number of bytes in a multibyte character.
`SHRT_MIN -32767`	Minimum value for a short int.
`SHRT_MAX +32767`	Maximum value for a short int.
`USHRT_MAX 65535`	Maximum value for an unsigned short int.
`INT_MIN -32767`	Minimum value for an int.
`INT_MAX +32767`	Maximum value for an int.
`UINT_MAX 65535`	Maximum value for an unsigned int.
`LONG_MIN -2147483647`	Minimum value for a long int.
`LONG_MAX +2147483647`	Maximum value for a long int.
`ULONG_MAX 4294967295`	Maximum value for an unsigned long int.