Quiz: The length of a phrase

What will the .chars method return for the following strings?

4	'Raku' — (: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 :)
13	'Raku & Rakudo' — (: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 :)	Spaces are also countable.
6	'Ça va?' — (: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 :)	Ç is a single Unicode character.
0	'' — (: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 :)	An empty string.
2	'中国' — (: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 :)	More than two bytes in UTF-8, but still only two characters.

Course navigation