Cannot change variable type

---

examples/variables/cannot-change-type/src/main.rs

fn main() {
    let mut answer = "What is the answer";
    println!("{answer}");

    answer = 42;
    println!("{answer}");
}

error: expected `;`, found `answer`
 --> src/main.rs:3:25
  |
3 |     println!("{answer}")
  |                         ^ help: add `;` here
4 |
5 |     answer = 42;
  |     ------ unexpected token

error[E0308]: mismatched types
 --> src/main.rs:5:14
  |
2 |     let mut answer = "What is the answer";
  |                      -------------------- expected due to this value
...
5 |     answer = 42;
  |              ^^ expected `&str`, found integer

For more information about this error, try `rustc --explain E0308`.
error: could not compile `cannot-change-type` (bin "cannot-change-type") due to 2 previous errors