fn main() {

  let my_num: i32 = 5;          // integer

  let my_double: f64 = 5.99;    // float

  let my_letter: char = 'D';    // character

  let my_bool: bool = true;     // boolean

  let my_text: &str = "Hello";  // string

​

  println!("my_num = {}", my_num);

  println!("my_double = {}", my_double);

  println!("my_letter = {}", my_letter);

  println!("my_bool = {}", my_bool);

  println!("my_text = {}", my_text);

}