Standard library header <assert.h>

 

C

Compiler support

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

Algorithms

Numerics

Date and time utilities

Input/output support

Localization support

Concurrency support (C11)

Technical Specifications

Symbol index

 

Standard Library headers

<assert.h> <complex.h> (C99) <ctype.h> <errno.h> <fenv.h> (C99) <float.h> <inttypes.h> (C99)     <iso646.h> (C95) <limits.h> <locale.h> <math.h>

<setjmp.h> <signal.h> <stdalign.h> (C11*) <stdarg.h> <stdatomic.h> (C11)     <stdbit.h> (C23) <stdbool.h> (C99*) <stdckdint.h> (C23) <stddef.h> <stdint.h> (C99) <stdio.h>

<stdlib.h> <stdmchar.h> (C29) <stdnoreturn.h> (C11*) <string.h> <tgmath.h> (C99) <threads.h> (C11) <time.h> <uchar.h> (C11) <wchar.h> (C95) <wctype.h> (C95)

 

This header is part of the error handling library.

Macros
assert	aborts the program if the user-specified condition is not true. May be disabled for release builds (function macro)

Synopsis

#if __STDC_VERSION__ >= 202311L
#   define __STDC_VERSION_ASSERT_H__ 202311L
#   ifdef NDEBUG
#       define assert(...) ((void)0)
#   else
#       define assert(...) /* implementation-defined */
#   endif
#else
#   ifdef NDEBUG
#       define assert(condition) ((void)0)
#   else
#       define assert(condition) /* implementation-defined */
#   endif
#endif