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not macro - <iso646.h> - C
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<iso646.h> C Header

Macros:

C Standard Library

C Standard Library

<assert.h>(C89) <complex.h>(C99)op <ctype.h>(C89) <errno.h>(C89) <fenv.h>(C99) <float.h>(C89) <inttypes.h>(C99) <iso646.h>(NA1) <limits.h>(C89) <locale.h>(C89) <math.h>(C89) <setjmp.h>(C89) <signal.h>(C89) <stdalign.h>(C11) <stdarg.h>(C89) <stdatomic.h>(C11)op <stdbool.h>(C99) <stddef.h>(C89) <stdint.h>(C99) <stdio.h>(C89) <stdlib.h>(C89) <stdnoreturn.h>(C11) <string.h>(C89) <tgmath.h>(C99) <threads.h>(C11)op <time.h>(C89) <uchar.h>(C11) <wchar.h>(NA1) <wctype.h>(NA1)

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The not macro, which is part of [[c/iso646.h<iso646.h>#|iso646.h<iso646.h>]], is a convenient object-like macro name that expands to the ! operator. The macro was added in Normative Addendum 1 in an effort to provide support for international character sets that might not have the ! symbols.

Synopsis

#include <iso646.h>
#define not !

Description

The not object-like macro expands to the ! operator.

Example

#include <iso646.h>

int main ()
{
    if (not(2 == 1))
        return 1;
    return 0;
}
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