Booleans (bool)

let is_morning = true;
    if is_morning {
        println!("Good morning!");
    }

Characters (char)

fn main() {
    let c1 = 'a'; // 字母
    let c2 = '中'; // 中文
    let c3 = '

标签：字符,primitive,uppercase,true,lowercase,ASCII,type,类型,ascii	

From： https://www.cnblogs.com/learnForLife/p/18673408