Shadowing¶

Using shadowing, you can define a new variable with the same name as a previous variable.

fn main() {
    let a = 10;
    println!("{}", a);
    let a = 20;
    println!("{}", a);
}

Shadowing is different than marking a variable as mutable mut - you can also change it's data types:

fn main() {
    let b:u32 = 128;
    println!("{}", b);
    let b:char = 'c';
    println!("{}", b);
}

When using mutuable variables - the data type will be only limited to u32.