ex02.2_variables_scope.js

let height = 200;
{
    let weight = 100;
    {
        let info = "tall";
        console.log(height); // -> 200
        console.log(weight); // -> 100
        console.log(info); // -> tall
    }
    console.log(height); // -> 200
    console.log(weight); // -> 100
    console.log(info); // -> Uncaught ReferenceError: info is not defined
 }