not-eq.md

description	title	ms.date	api_location	api_type	topic_type	f1_keywords	helpviewer_keywords
Learn more about: not_eq	not_eq	08/09/2024	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll	DLLExport	apiref	ISO646/not_eq not_eq std::not_eq std.not_eq	not_eq function

not_eq

An alternative spelling for the != operator.

Syntax

#define not_eq !=

Remarks

C++:

• not_eq can be used as alternative to !=. The /permissive- or /Za compiler option is required.
• Including <iso646.h> or <ciso646> is deprecated. You can use the alternative spelling without including any header files.
• There's no alternative spelling for ==.

C:

• not_eq is an alternative spelling for !=. It is provided as a macro in <iso646.h>, which you must #include.
• There's no alternative spelling for ==.

Example

// compile with: /EHsc
#include <iostream>
#include <iso646.h>

int main( )
{
   int x = 1, y = 2;
    
    // not_eq is available in C++ and C
    // This example is for C++, so no header file is needed to use not_eq
    // When compiling for C, #include <iso646.h> to use not_eq
    if (x not_eq y)
    {
        std::cout << "Not equal\n";
    }
}

Not equal

Requirements

Header: <iso646.h> is necessary if you are compiling for C.