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

SDL_expf

Compute the exponential of x.

Header File

Syntax

float SDL_expf(float x);

Function Parameters

float

floating point value.

Return Value

(float) 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_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.

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.1.3.