---
name: "SDL_trunc"
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_trunc"
---

# SDL\_trunc(3)

Truncate x to an integer.

## NAME

SDL\_trunc - Truncate **x** to an integer.

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

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

## DESCRIPTION

Rounds **x** to the next closest integer to 0. This is equivalent to removing the fractional part of **x** , leaving only the integer part.

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

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

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

## FUNCTION PARAMETERS

- *x*

  floating point value.

## RETURN VALUE

Returns **x** truncated to an integer.

## 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\_truncf**(3)](/SDL_truncf/3.md), **•**(3), [**SDL\_fmod**(3)](/SDL_fmod/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)