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Add example for C2290 error reference #5701

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Update error message in C2290 error reference
Rageking8 Aug 23, 2025
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Augment remarks in C2290 error reference
Rageking8 Aug 23, 2025
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Add example in C2290 error reference
Rageking8 Aug 23, 2025
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Update `ms.date` metadata in C2290 error reference
Rageking8 Aug 23, 2025
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21 changes: 18 additions & 3 deletions docs/error-messages/compiler-errors-1/compiler-error-c2290.md
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---
title: "Compiler Error C2290"
description: "Learn more about: Compiler Error C2290"
ms.date: 11/04/2016
ms.date: 08/23/2025
f1_keywords: ["C2290"]
helpviewer_keywords: ["C2290"]
---
# Compiler Error C2290

> C++ asm syntax ignored. Use __asm.
> C++ 'asm' syntax ignored. Use __asm.

## Remarks

The **`asm`** syntax is reserved for future use.
The **`asm`** syntax is reserved for future use, try [`__asm`](../../assembler/inline/asm.md) instead. For more information, see [Inline Assembler](../../assembler/inline/inline-assembler.md).

## Example

The following example generates C2290:

```cpp
// C2290.cpp
// processor: x86

int main()
{
asm("nop"); // C2290
__asm nop // OK
}
```