fn main() {

  struct Person {

    name: String,

    age: u32,

  }

  let mut user = Person {

    name: String::from("John"),

    age: 35,

  };

​

  user.age = 36;  // Change value of age

  println!("Name: {}", user.name);

  println!("Updated age: {}", user.age);

}