Fastest integer types of at least 32 bits

Names specified here
Name	Description	Notes				Source
`atomic_int_fast32_t`	Atomic integer type		?		T	`<stdatomic.h>`		C11
`atomic_uint_fast32_t`	Atomic integer type		?		T	`<stdatomic.h>`		C11
`INT_FAST32_MAX`	Maximum value of `int_fast32_t`	L		M		`<stdint.h>`	C99	C11
`INT_FAST32_MIN`	Minimum value of `int_fast32_t`	L		M		`<stdint.h>`	C99	C11
`int_fast32_t`	Fastest signed integer type with at least 32 bits	L			T	`<stdint.h>`	C99	C11
`PRIdFAST32`	Decimal output conversion specifier for `int_fast32_t`			M		`<inttypes.h>`	C99	C11
`PRIiFAST32`	Decimal output conversion specifier for `int_fast32_t`			M		`<inttypes.h>`	C99	C11
`PRIoFAST32`	Octal output conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`PRIuFAST32`	Decimal output conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`PRIXFAST32`	Hexdecimal output conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`PRIxFAST32`	Hexdecimal output conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`SCNdFAST32`	Decimal input conversion specifier for `int_fast32_t`			M		`<inttypes.h>`	C99	C11
`SCNiFAST32`	General input conversion specifier for `int_fast32_t`			M		`<inttypes.h>`	C99	C11
`SCNoFAST32`	Octal input conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`SCNuFAST32`	Decimal input conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`SCNxFAST32`	Hexdecimal input conversion specifier for `uint_fast32_t`			M		`<inttypes.h>`	C99	C11
`UINT_FAST32_MAX`	Maximum value of `uint_fast32_t`	L		M		`<stdint.h>`	C99	C11
`uint_fast32_t`	Fastest unsigned integer type with at least 32 bits	L			T	`<stdint.h>`	C99	C11

uint_fast32_t and int_fast32_t are the fastest integer types of at least 32 bits. uint_fast32_t is unsigned, and has the range zero to UINT_FAST32_MAX, which is at least [0, +4294967295]. int_fast32_t is signed, and has the range INT_FAST32_MIN to INT_FAST32_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_fast32_t and int_fast32_t:

PRIuFAST32
PRIoFAST32
PRIxFAST32
PRIXFAST32
PRIdFAST32
PRIiFAST32

The following macros can be used in the fmt argument of scanf to scan arguments of types uint_fast32_t * and int_fast32_t *:

SCNuFAST32
SCNoFAST32
SCNxFAST32
SCNdFAST32
SCNiFAST32

atomic_uint_fast32_t is an alias for _Atomic uint_fast32_t. atomic_int_fast32_t is an alias for _Atomic int_fast32_t.

Related types:

uint32_t
int32_t
uint_least32_t
int_least32_t
uint_fast32_t
int_fast32_t

Property		`uint_fast32_t`	`int_fast32_t`
Minimum width (bits)		32
Lowest value		0	≤−2147483647
Highest value		≥+4294967295	≥+2147483647
`printf`	base 10	`"%" PRIuFAST32`	`"%" PRIdFAST32` or `"%" PRIiFAST32`
	base 8	`"%" PRIoFAST32`
	upper-case base 16	`"%" PRIXFAST32`
	lower-case base 16	`"%" PRIxFAST32`
`scanf`	base 10	`"%" SCNuFAST32`	`"%" SCNdFAST32`
	base 8	`"%" SCNoFAST32`
	base 16	`"%" SCNxFAST32`
	base 16, 8 or 10 by prefix		`"%" SCNiFAST32`