[Rust] match as an expression

fn main() {
    let char = 'c';

    let sound = match char {
        'A' | 'a' | 'E' | 'e' | 'I' | 'i' | 'O' | 'o' | 'U' |'u' => "vowel",
        'A' ... 'Z' | 'a' ... 'z' => "consonant",
        _ => "other"
    };

    assert_eq!(sound, "consonant");
}