# SDL_isspace

Report if a character is whitespace.

## Header File

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

## Syntax

```c
int SDL_isspace(int x);
```

## Function Parameters

|     |       |                           |
| --- | ----- | ------------------------- |
| int | **x** | character value to check. |

## Return Value

(int) Returns non-zero if x falls within the character class, zero
otherwise.

## Remarks

**WARNING**: Regardless of system locale, this will only treat the
following ASCII values as true:

- space (0x20)
- tab (0x09)
- newline (0x0A)
- vertical tab (0x0B)
- form feed (0x0C)
- return (0x0D)

## Thread Safety

It is safe to call this function from any thread.

## Version

This function is available since SDL 3.2.0.

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