If you are curious what the binary of an ascii/utf-8 char is you can use this string of commands at the command line:
echo 'A' | xxd -b
A character is 65 in ascii which is 64 + 1.
01000000 is 64.
00000001 is of course 1,
01000001 is 65.
echo 'a' | xxd -b
a character is 97 in ascii which is 64 + 32 + 1.
00100000 is 32 in binary, given this and the above,
01100001 is 97.
echo '🤓' | xxd -b
This ridiculous emoji is a utf-8 char. When you look at the binary for it:
11110000 10011111 10100100 10010011
You can see that every byte begins with a 1 which means that it will combine with any subsequent byte beginning with 1 to form a unique character.