t_wの輪郭

Display特性のメソッド
Stringを生成する

fn main() {
    let s : &str = "Hello, world";
    let string1 = s.to_string();
    let string2 = "world hello".to_string();
    let i = 1;
    let string3 = i.to_string();
    let string4 = 2.to_string();
    println!("{}", string1);      //Hello, world
    println!("{}", string2);      //world hello
    println!("{}", string3);      //1
    println!("{}", string4);      //2
}