| % Mutability |
| |
| <small>There is a new edition of the book and this is an old link.</small> |
| |
| > Variables are immutable only by default; we can make them mutable by adding mut in front of the variable name. |
| |
| ```rust |
| let mut x = 5; |
| println!("The value of x is: {x}"); |
| x = 6; |
| println!("The value of x is: {x}"); |
| ``` |
| |
| --- |
| |
| Here are the relevant sections in the new and old books: |
| |
| * **[in the current edition: Ch 3.01 — Variables and Mutability][2]** |
| * <small>[In the first edition: Ch 3.11 — Mutability][1]</small> |
| |
| |
| [1]: https://doc.rust-lang.org/1.30.0/book/first-edition/mutability.html |
| [2]: ch03-01-variables-and-mutability.html |
