---
name: "SDL_fmod"
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_fmod"
---

# SDL\_fmod(3)

Return the floating-point remainder of x/y

## NAME

SDL\_fmod - Return the floating-point remainder of **x**/**y**

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**double SDL\_fmod(double x, double y);**

## DESCRIPTION

Divides **x** by **y** , and returns the remainder.

Domain: **-INF**\<=**x**\<=**INF** , **-INF**\<=**y**\<=**INF** , **y**!=**0** Range: **-y**\<=**z**\<=**y** This function operates on double-precision floating point values, use

**SDL\_fmodf**\
  for single-precision floats.

## FUNCTION PARAMETERS

- *x*

  the numerator.

- *y*

  the denominator. Must not be 0.

## RETURN VALUE

Returns the remainder of **x**/**y** .

## 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\_fmodf**(3)](/SDL_fmodf/3.md), **•**(3), [**SDL\_modf**(3)](/SDL_modf/3.md), **•**(3), [**SDL\_trunc**(3)](/SDL_trunc/3.md), **•**(3), [**SDL\_ceil**(3)](/SDL_ceil/3.md), **•**(3), [**SDL\_floor**(3)](/SDL_floor/3.md), **•**(3), [**SDL\_round**(3)](/SDL_round/3.md), **•**(3), [**SDL\_lround**(3)](/SDL_lround/3.md)