Variables Bindings Example

fn main() {

    // Immutable variable
    let my_var: i32 = 5;

    println!("my_var is {}.", my_var);


    // Uncomment to see the error.
    // my_var = 6;

    println!("my_var is {}.", my_var);


    // Mutable variable
    let mut x = 5;

    println!("x is {}.", x);

    x = 10;

    println!("x is {}.", x);
}