---
name: "SDL_expf"
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_expf"
---

# SDL\_expf(3)

Compute the exponential of x .

## NAME

SDL\_expf - Compute the exponential of **x** .

## HEADER FILE

Defined in SDL3/SDL\_stdinc.h

## SYNOPSIS

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

**float SDL\_expf(float x);**

## DESCRIPTION

The definition of **y**=**exp(x)** is **y**=**e^x** , where **e** is the base of the natural logarithm. The inverse is the natural logarithm,

**SDL\_logf** .

Domain: **-INF**\<=**x**\<=**INF** Range: **0**\<=**y**\<=**INF** The output will overflow if **exp(x)** is too large to be represented.

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

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

This function may use a different approximation across different versions, platforms and configurations. i.e, it can return a different value given the same input on different machines or operating systems, or if SDL is updated.

## FUNCTION PARAMETERS

- *x*

  floating point value.

## RETURN VALUE

Returns value of **e^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\_exp**(3)](/SDL_exp/3.md), **•**(3), [**SDL\_logf**(3)](/SDL_logf/3.md)