---
name: "SDL_modff"
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_modff"
---

# SDL\_modff(3)

Split x into integer and fractional parts

## NAME

SDL\_modff - Split **x** into integer and fractional parts

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**float SDL\_modff(float x, float \*y);**

## DESCRIPTION

This function operates on single-precision floating point values, use

**SDL\_modf**\
  for double-precision floats.

## FUNCTION PARAMETERS

- *x*

  floating point value.

- *y*

  output pointer to store the integer part of **x** .

## RETURN VALUE

Returns the fractional part of **x** .

## 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\_modf**(3)](/SDL_modf/3.md), **•**(3), [**SDL\_truncf**(3)](/SDL_truncf/3.md), **•**(3), [**SDL\_fmodf**(3)](/SDL_fmodf/3.md)