#![allow(unused_variables)]
#![allow(unused_must_use)]
fn main() {
    format!("Hello");
    format!("Hello, {}!", "world");
    format!("The number is {}", 1);
    format!("{:?}", (3, 4));
    format!("{value}", value = 4);
    let people = "Rustaceans";
    format!("Hello {people}!");
    format!("{} {}", 1, 2);
    format!("{:04}", 42);
    format!("{:#?}", (100, 200));
}