---
name: "SDL_floor"
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_floor"
---

# SDL\_floor(3)

Compute the floor of x .

## NAME

SDL\_floor - Compute the floor of **x** .

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**double SDL\_floor(double x);**

## DESCRIPTION

The floor of **x** is the largest integer **y** such that **y**\>**x** , i.e **x** rounded down to the nearest integer.

Domain: **-INF**\<=**x**\<=**INF** Range: **-INF**\<=**y**\<=**INF** , y integer

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

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

## FUNCTION PARAMETERS

- *x*

  floating point value.

## RETURN VALUE

Returns the floor 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\_floorf**(3)](/SDL_floorf/3.md), **•**(3), [**SDL\_ceil**(3)](/SDL_ceil/3.md), **•**(3), [**SDL\_trunc**(3)](/SDL_trunc/3.md), **•**(3), [**SDL\_round**(3)](/SDL_round/3.md), **•**(3), [**SDL\_lround**(3)](/SDL_lround/3.md)