###### (This is the documentation for SDL3, which is under heavy development and the API is changing! [SDL2](https://wiki.libsdl.org/SDL2/) is the current stable version!)
# SDL_GetPrimaryDisplay

Return the primary display.

## Header File

Defined in [<SDL3/SDL_video.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_video.h)

## Syntax

```c
SDL_DisplayID SDL_GetPrimaryDisplay(void);

```

## Return Value

Returns the instance ID of the primary display on success or 0 on failure;
call [SDL_GetError](SDL_GetError)() for more information.

## Version

This function is available since SDL 3.0.0.

## See Also

* [SDL_GetDisplays](SDL_GetDisplays)

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[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction)