Narrowest integer types of at least 32 bits

Names specified here
Name	Description	Notes				Source
`atomic_int_least32_t`	Atomic integer type		?		T	`<stdatomic.h>`		C11
`atomic_uint_least32_t`	Atomic integer type		?		T	`<stdatomic.h>`		C11
`INT32_C()`	Create constant of type `int_least32_t`	L		M	(·)	`<stdint.h>`	C99	C11
`INT_LEAST32_MAX`	Maximum value of `int_least32_t`	L		M		`<stdint.h>`	C99	C11
`INT_LEAST32_MIN`	Minimum value of `int_least32_t`	L		M		`<stdint.h>`	C99	C11
`int_least32_t`	Smallest signed integer type with at least 32 bits	L			T	`<stdint.h>`	C99	C11
`PRIdLEAST32`	Decimal output conversion specifier for `int_least32_t`			M		`<inttypes.h>`	C99	C11
`PRIiLEAST32`	Decimal output conversion specifier for `int_least32_t`			M		`<inttypes.h>`	C99	C11
`PRIoLEAST32`	Octal output conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`PRIuLEAST32`	Decimal output conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`PRIXLEAST32`	Hexdecimal output conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`PRIxLEAST32`	Hexdecimal output conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`SCNdLEAST32`	Decimal input conversion specifier for `int_least32_t`			M		`<inttypes.h>`	C99	C11
`SCNiLEAST32`	General input conversion specifier for `int_least32_t`			M		`<inttypes.h>`	C99	C11
`SCNoLEAST32`	Octal input conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`SCNuLEAST32`	Decimal input conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`SCNxLEAST32`	Hexdecimal input conversion specifier for `uint_least32_t`			M		`<inttypes.h>`	C99	C11
`UINT32_C()`	Create constant of type `uint_least32_t`	L		M	(·)	`<stdint.h>`	C99	C11
`UINT_LEAST32_MAX`	Maximum value of `uint_least32_t`	L		M		`<stdint.h>`	C99	C11
`uint_least32_t`	Smallest unsigned integer type with at least 32 bits	L			T	`<stdint.h>`	C99	C11

uint_least32_t and int_least32_t are the smallest integer types of at least 32 bits. uint_least32_t is unsigned, and has the range zero to UINT_LEAST32_MAX, which is at least [0, +4294967295]. int_least32_t is signed, and has the range INT_LEAST32_MIN to INT_LEAST32_MAX, which is at least [−2147483647, +2147483647].

The following macros can be used in the fmt argument of printf to print arguments of types uint_least32_t and int_least32_t:

PRIuLEAST32
PRIoLEAST32
PRIxLEAST32
PRIXLEAST32
PRIdLEAST32
PRIiLEAST32

The following macros can be used in the fmt argument of scanf to scan arguments of types uint_least32_t * and int_least32_t *:

SCNuLEAST32
SCNoLEAST32
SCNxLEAST32
SCNdLEAST32
SCNiLEAST32

atomic_uint_least32_t is an alias for _Atomic uint_least32_t. atomic_int_least32_t is an alias for _Atomic int_least32_t.

Related types:

uint32_t
int32_t
uint_least32_t
int_least32_t
uint_fast32_t
int_fast32_t

Property		`uint_least32_t`	`int_least32_t`
Minimum width (bits)		32
Lowest value		0	≤−2147483647
Highest value		≥+4294967295	≥+2147483647
Constant		`UINT32_C(untyped-integer-constant)`	`INT32_C(untyped-integer-constant)`
`printf`	base 10	`"%" PRIuLEAST32`	`"%" PRIdLEAST32` or `"%" PRIiLEAST32`
	base 8	`"%" PRIoLEAST32`
	upper-case base 16	`"%" PRIXLEAST32`
	lower-case base 16	`"%" PRIxLEAST32`
`scanf`	base 10	`"%" SCNuLEAST32`	`"%" SCNdLEAST32`
	base 8	`"%" SCNoLEAST32`
	base 16	`"%" SCNxLEAST32`
	base 16, 8 or 10 by prefix		`"%" SCNiLEAST32`