Standard library header <assert.h>

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