Redeclare immutable variable and change type - Shadowing

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• When shadowing we can also change the type of the variable.
• We don't even need to make it mutable.
• e.g. we read from a file or from STDIN a string that we then convert to a number. We can use the same variable name.

examples/variables/change-type/src/main.rs

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

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

    let answer = 42;
    println!("{answer}");
    println!("{}", answer + 1);
}

What is the answer
42
42
43