Why doesn't strcmp() return 0?

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

int main(void)
{
    printf("%d\n", strcmp("Hello", "HeIIo"));
    return 0;
}

HEY GUYS, I THINK THIS GUY IS TRYING TO TRICK US.

THE STRINGS AREN'T THE SAME, HE'S USING AN UNICODE CHARACTER OR SOMETHING.

WTF?