Header index

Header	Purpose	Availability
`<assert.h>`	Diagnostic assertions	C89	C90	C95	C99	C11
`<complex.h>`	Mathematical operations				C99	C11
`<ctype.h>`	Classification and transformation of single-byte characters	C89	C90	C95	C99	C11
`<errno.h>`	Error status	C89	C90	C95	C99	C11
`<fenv.h>`	Floating-point environment				C99	C11
`<float.h>`	Characteristics of floating-point types	C89	C90	C95	C99	C11
`<inttypes.h>`	Integer types with particular characteristics, and `printf`/`scanf` conversion specifiers				C99	C11
`<iso646.h>`	Verbal operators			C95	C99	C11
`<limits.h>`	Integer type characteristics	C89	C90	C95	C99	C11
`<locale.h>`	Locales	C89	C90	C95	C99	C11
`<math.h>`	Mathematical operations	C89	C90	C95	C99	C11
`<setjmp.h>`	Non-local jumps	C89	C90	C95	C99	C11
`<signal.h>`	Signal handling	C89	C90	C95	C99	C11
`<stdalign.h>`	Alignment					C11
`<stdarg.h>`	Variable-length argument lists	C89	C90	C95	C99	C11
`<stdatomic.h>`	Atomics					C11
`<stdbool.h>`	Boolean type				C99	C11
`<stddef.h>`	Miscellaneous types and constants	C89	C90	C95	C99	C11
`<stdint.h>`	Integer types with particular characteristics				C99	C11
`<stdio.h>`	Input/output	C89	C90	C95	C99	C11
`<stdlib.h>`	Miscellaneous utilities	C89	C90	C95	C99	C11
`<stdnoreturn.h>`	Non-returning functions					C11
`<string.h>`	String manipulation	C89	C90	C95	C99	C11
`<tgmath.h>`	Type-generic mathematical operations				C99	C11
`<threads.h>`	Threads					C11
`<time.h>`	Time representation	C89	C90	C95	C99	C11
`<uchar.h>`	Unicode utilities					C11
`<wchar.h>`	Wide-character type and utilities			C95	C99	C11
`<wctype.h>`	Classification and transformation of wide characters			C95	C99	C11