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# nng_strerror
## NAME
nng_strerror --- return an error description
## SYNOPSIS
```c
#include <nng/nng.h>
const char *nng_strerror(int err);
```
## DESCRIPTION
The {{i:`nng_strerror`}} returns the human-readable description of the
given error in `err`.
The returned {{i:error message}} is provided in US English, but in the
future locale-specific strings may be presented instead.
> [!NOTE]
> The specific strings associated with specific error messages are
> subject to change.
> Therefore applications must not depend on the message,
> but may use them verbatim when supplying information to end-users, such
> as in diagnostic messages or log entries.
## RETURN VALUES
This function returns the human-readable error message, terminated
by a `NUL` byte.
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