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

SDL_isnan

Return whether the value is NaN.

Header File

Defined in <SDL3/SDL_stdinc.h>

Syntax

int SDL_isnan(double x);

Function Parameters

double

x

double-precision floating point value.

Return Value

(int) Returns non-zero if the value is NaN, 0 otherwise.

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_isnanf

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CategoryAPI, CategoryAPIFunction, CategoryStdinc

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