---
name: "SDL_isinf"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_isinf"
---

# SDL\_isinf(3)

Return whether the value is infinity.

## NAME

SDL\_isinf - Return whether the value is infinity.

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**int SDL\_isinf(double x);**

## FUNCTION PARAMETERS

- *x*

  double-precision floating point value.

## RETURN VALUE

Returns non-zero if the value is infinity, 0 otherwise.

## THREAD SAFETY

It is safe to call this function from any thread.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_isinff**(3)](/SDL_isinff/3.md)