#include <stdio.h>
#include <string.h>

int main(void) {

    // This variable doesn't look like it is valid C
    // As variable must be single words
    // replacing the space with an underscore `_` would make it valid

    // EXCEPT that the space is not a space
    // it's the "HALFWIDTH HANGUL FILLER" character
    // the HALFWIDTH HANGUL FILLER is rather special
    // as it is one of very few characters that are invisible
    // ie don't have a visible glyph
    // yet isn't a whitespace character (has the WhiteSpace=yes UNICODE property)
    // This means that C allows it to be used in variable names

    int helloﾠworld = 20;
    printf("hello world = %d\n", helloﾠworld);

    // Please never actually use this character in variable names

    return 0;
}