###### (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_log10f
Compute the base-10 logarithm of `x`.
## Header File
Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_stdinc.h)
## Syntax
```c
float SDL_log10f(float x);
```
## Function Parameters
| | | |
| ----- | ----- | --------------------------------------------- |
| float | **x** | floating point value. Must be greater than 0. |
## Return Value
(float) Returns the logarithm of `x`.
## Remarks
Domain: `0 < x <= INF`
Range: `-INF <= y <= INF`
It is an error for `x` to be less than or equal to 0.
This function operates on single-precision floating point values, use
[SDL_log10](SDL_log10) 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.
## 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_log10](SDL_log10)
- [SDL_logf](SDL_logf)
- [SDL_powf](SDL_powf)
----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryStdinc](CategoryStdinc)