---
name: "nng_aio_set_output"
section: "3"
platform: "linux"
package: "libnng-dev"
version: "1.10.1-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nng_aio_set_output"
---

# nng\_aio\_set\_output(3)

set output result

## NAME

nng\_aio\_set\_output - set output result

## SYNOPSIS

```
#include <nng/nng.h>
void nng_aio_set_output(nng_aio *aio, unsigned int index, void *result);
```

## DESCRIPTION

The `nng_aio_set_output()` function sets the output result at *index* to *result* for the asynchronous operation associated with *aio*.

The type and semantics of output results are determined by specific operations; the operation must supply appropriate output results when the operation completes successfully.

The valid values of *index* range from zero (0) to three (3), as no operation currently defined can return more than four results. (This limit could increase in the future.)

**Note**\

Note that attempts to set results with an *index* greater than three (3) will be ignored.

An output result set with this function may be retrieved later with the `nng_aio_get_output()` function.

## RETURN VALUES

None.

## ERRORS

None.

## SEE ALSO

[nng\_aio\_alloc(3)](/nng_aio_alloc/3.md), [nng\_aio\_finish(3)](/nng_aio_finish/3.md), [nng\_aio\_get\_output(3)](/nng_aio_get_output/3.md), [nng\_aio\_result(3)](/nng_aio_result/3.md), [nng\_aio(5)](/nng_aio/5.md), [nng(7)](/nng/7.md)