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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | STANDARDS | HISTORY | NOTES | BUGS | SEE ALSO | COLOPHON |
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intmax_t(3type) intmax_t(3type)
intmax_t, uintmax_t - greatest-width basic integer types
Standard C library (libc)
#include <stdint.h>
typedef /* ... */ intmax_t;
typedef /* ... */ uintmax_t;
#define INTMAX_WIDTH /* ... */
#define UINTMAX_WIDTH INTMAX_WIDTH
#define INTMAX_MAX /* 2**(INTMAX_WIDTH - 1) - 1 */
#define INTMAX_MIN /* - 2**(INTMAX_WIDTH - 1) */
#define UINTMAX_MAX /* 2**UINTMAX_WIDTH - 1 */
#define INTMAX_C(c) c ## /* ... */
#define UINTMAX_C(c) c ## /* ... */
intmax_t is a signed integer type capable of representing any
value of any basic signed integer type supported by the
implementation. It is capable of storing values in the range
[INTMAX_MIN, INTMAX_MAX].
uintmax_t is an unsigned integer type capable of representing any
value of any basic unsigned integer type supported by the
implementation. It is capable of storing values in the range [0,
UINTMAX_MAX].
The macros [U]INTMAX_WIDTH expand to the width in bits of these
types.
The macros [U]INTMAX_MAX expand to the maximum value that these
types can hold.
The macro INTMAX_MIN expands to the minimum value that intmax_t
can hold.
The macros [U]INTMAX_C() expand their argument to an integer
constant of type [u]intmax_t.
The length modifier for [u]intmax_t for the printf(3) and the
scanf(3) families of functions is j; resulting commonly in %jd,
%ji, %ju, or %jx for printing [u]intmax_t values.
C11, POSIX.1-2008.
C99, POSIX.1-2001.
The following header also provides these types: <inttypes.h>.
These types may not be as large as extended integer types, such as
__int128
int64_t(3type), intptr_t(3type), printf(3), strtoimax(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 intmax_t(3type)
Pages that refer to this page: intN_t(3type), intptr_t(3type)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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