Namespaces
Variants

Standard library header <limits.h>

From cppreference.net
C
Standard Library headers

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)
MB_LEN_MAX
maximum number of bytes in a multibyte character
(macro constant)
CHAR_WIDTH
(C23)
bit width of char , same as CHAR_BIT
(macro constant)
CHAR_MIN
minimum value of char
(macro constant)
CHAR_MAX
maximum value of char
(macro constant)
SCHAR_WIDTH SHRT_WIDTH INT_WIDTH LONG_WIDTH LLONG_WIDTH
(C23) (C23) (C23) (C23) (C23)
bit width of signed char , short , int , long , and long long respectively
(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_WIDTH USHRT_WIDTH UINT_WIDTH ULONG_WIDTH ULLONG_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_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)
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)

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 */