###### (This is the documentation for SDL3, which is under heavy development and the API is changing! [SDL2](https://wiki.libsdl.org/SDL2/) is the current stable version!)
# SDL_exp
Compute the exponential of `x`.
## Header File
Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_stdinc.h)
## Syntax
```c
double SDL_exp(double x);
```
## Function Parameters
| | | |
| ------ | ----- | --------------------- |
| double | **x** | floating point value. |
## Return Value
(double) Returns value of `e^x`.
## Remarks
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_log](SDL_log).
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 double-precision floating point values, use
[SDL_expf](SDL_expf) for single-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.
## Thread Safety
It is safe to call this function from any thread.
## Version
This function is available since SDL 3.0.0.
## See Also
- [SDL_expf](SDL_expf)
- [SDL_log](SDL_log)
----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryStdinc](CategoryStdinc)