SDL_tolower - Man Page

#include <SDL3/SDL_stdinc.h>

int SDL_tolower(int x);

WARNING: Regardless of system locale, this will only convert ASCII values 'A' through 'Z' to lowercase.

This function returns the lowercase equivalent of x. If a character cannot be converted, or is already lowercase, this function returns x.

x

character value to check.

Returns lowercase version of x, or x if no conversion available.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.