(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_log

Compute the natural logarithm of x.

Header File

Syntax

double SDL_log(double x);

Function Parameters

double

floating point value. Must be greater than 0.

Return Value

(double) Returns the natural 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 double-precision floating point values, use SDL_logf 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 3.1.3.