How to create a multiline string in Rust

Using triple-quotes

A string literal is a sequence of any Unicode characters enclosed within two U+0022 (double-quote) characters, with the exception of U+0022 itself, which must be escaped by a preceding U+005C character (\). The following example:

fn main() {
  // Backslash line brea
  let s = "Apple \
  Google \
  Twitter";

  println!("{}", s);

  // unnecessary spaces
  let s1 = "Apple
  Google
  Twitter";

  println!("{}", s1);
}

Apple Google Twitter
Apple
  Google
  Twitter

Using Raw string literals

Raw string literals do not process any escapes. They start with the character U+0072 (r), followed by zero or more of the character U+0023 (#) and a U+0022 (double-quote) character. For example,

fn main() {
  // Raw string literals
  let s = r#"Apple
  Google
  Twitter"#;

  println!("{}", s);
}

Apple
  Google
  Twitter

you can denote an arbitrary number of hashes as a delimiter:

fn main() {
  // Raw string literals
  let s = r###"Apple
  Google ##"#
  Twitter"###;

  println!("{}", s);
}

Apple
  Google ##"#
  Twitter

Using concat Method

You can use the concat! macro. It concatenates string literals at compile time. For example,

fn main() {
  // concat
  let s = concat!(
    "Apple", 
    10, 
    true
  );

  println!("{}", s);
}

Apple10btrue