SDL_isalpha - Man Page

Defined in SDL3/SDL_stdinc.h

#include "SDL3/SDL.h"

int SDL_isalpha(int x);

WARNING : Regardless of system locale, this will only treat ASCII values for English 'a-z' and 'A-Z' as true.

x

character value to check.

Returns non-zero if x falls within the character class, zero otherwise.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.