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Standard library header <limits.h>

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This header is part of the type support library, in particular it's part of the C numeric limits interface.

Limits of core language integer types
BOOL_WIDTH
(C23)
bit width of _Bool
(macro constant)
BOOL_MAX
(C29)
maximum value of _Bool
(macro constant)
CHAR_BIT
bit width of byte
(macro constant) [edit]
MB_LEN_MAX
maximum number of bytes in a multibyte character
(macro constant) [edit]
CHAR_WIDTH
(C23)
bit width of char, same as CHAR_BIT
(macro constant)
CHAR_MIN
minimum value of char
(macro constant) [edit]
CHAR_MAX
maximum value of char
(macro constant) [edit]
SCHAR_WIDTHSHRT_WIDTHINT_WIDTHLONG_WIDTHLLONG_WIDTH
(C23)(C23)(C23)(C23)(C23)
bit width of signed char, short, int, long, and long long respectively
(macro constant)
SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN
(C99)
minimum value of signed char, short, int, long and long long respectively
(macro constant) [edit]
SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX
(C99)
maximum value of signed char, short, int, long and long long respectively
(macro constant) [edit]
UCHAR_WIDTHUSHRT_WIDTHUINT_WIDTHULONG_WIDTHULLONG_WIDTH
(C23)(C23)(C23)(C23)(C23)
bit width of unsigned char, unsigned short, unsigned int, unsigned long, and unsigned 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) [edit]
BITINT_MAXWIDTH
(C23)
maximum width N supported by the declaration of a bit-precise integer in the type specifier _BitInt(N), greater than or equal to ULLONG_WIDTH
(macro constant)

[edit] Synopsis

#define __STDC_VERSION_LIMITS_H__ 202311L
 
#define BITINT_MAXWIDTH /* see description */
#define BOOL_MAX /* see description */
#define BOOL_WIDTH /* see description */
#define CHAR_BIT /* see description */
#define CHAR_MAX /* see description */
#define CHAR_MIN /* see description */
#define CHAR_WIDTH /* see description */
#define INT_MAX /* see description */
#define INT_MIN /* see description */
#define INT_WIDTH /* see description */
#define LLONG_MAX /* see description */
#define LLONG_MIN /* see description */
#define LLONG_WIDTH /* see description */
#define LONG_MAX /* see description */
#define LONG_MIN /* see description */
#define LONG_WIDTH /* see description */
#define MB_LEN_MAX /* see description */
#define SCHAR_MAX /* see description */
#define SCHAR_MIN /* see description */
#define SCHAR_WIDTH /* see description */
#define SHRT_MAX /* see description */
#define SHRT_MIN /* see description */
#define SHRT_WIDTH /* see description */
#define UCHAR_MAX /* see description */
#define UCHAR_WIDTH /* see description */
#define UINT_MAX /* see description */
#define UINT_WIDTH /* see description */
#define ULLONG_MAX /* see description */
#define ULLONG_WIDTH /* see description */
#define ULONG_MAX /* see description */
#define ULONG_WIDTH /* see description */
#define USHRT_MAX /* see description */
#define USHRT_WIDTH /* see description */
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