Standard library header <climits>

This header was originally in the C standard library as <limits.h>.

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

Macros

BOOL_WIDTH (C++26)	bit width 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 (C++26)	bit width of char (macro constant)
CHAR_MIN	minimum value of char (macro constant)
CHAR_MAX	maximum value of char (macro constant)
SCHAR_WIDTHSHRT_WIDTHINT_WIDTHLONG_WIDTHLLONG_WIDTH (C++26)(C++26)(C++26)(C++26)(C++26)	bit width of signedchar, short, int, long, and longlong respectively (macro constant)
SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN (C++11)	minimum value of signedchar, short, int, long and longlong respectively (macro constant)
SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX (C++11)	maximum value of signedchar, short, int, long and longlong respectively (macro constant)
UCHAR_WIDTHUSHRT_WIDTHUINT_WIDTHULONG_WIDTHULLONG_WIDTH (C++26)(C++26)(C++26)(C++26)(C++26)	bit width of unsignedchar, unsignedshort, unsignedint, unsignedlong, and unsignedlonglong respectively (macro constant)
UCHAR_MAXUSHRT_MAXUINT_MAXULONG_MAXULLONG_MAX (C++11)	maximum value of unsignedchar, unsignedshort, unsignedint, unsignedlong and unsignedlonglong respectively (macro constant)

Synopsis

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