###### (This is the documentation for SDL3, which is the current stable version. [SDL2](https://wiki.libsdl.org/SDL2/) was the previous version!) # SDL_fabsf Compute the absolute value of `x` ## Header File Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_stdinc.h) ## Syntax ```c float SDL_fabsf(float x); ``` ## Function Parameters | | | | | ----- | ----- | --------------------------------------------- | | float | **x** | floating point value to use as the magnitude. | ## Return Value (float) Returns the absolute value of `x`. ## Remarks Domain: `-INF <= x <= INF` Range: `0 <= y <= INF` This function operates on single-precision floating point values, use [SDL_copysignf](SDL_copysignf) for double-precision floats. ## Thread Safety It is safe to call this function from any thread. ## Version This function is available since SDL 3.1.3. ## See Also - [SDL_fabs](SDL_fabs) ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryStdinc](CategoryStdinc)