普通に利用できる。 ```rust let lang = "Rust"; let s1 = format!(r#"{lang} is "great!""#); println!("{s1}"); // Rust is "great!" let s2 = format!(r#"{{ "language": "{lang}" }}"#); println!("{s2}"); // { "language": "Rust" } ``` <button class="playground"><a href="https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=fe4bda12e1aba52a339a56461d3a410e">Playground</a></button>