how hoisting works ? difference between function and variable

Question

may i know how this code execute?

function scope() {
  return hosting;

  function hosting() {
    var hosting = '15';
  }
  var hosting = 12;

}

console.log(typeof scope())

here this code return function, we now js engine will move the declaration to top so we get function,

function scope() {
  return hosting;

  var hosting = 12;
}

console.log(typeof scope())

but now why its not return number?, but i know we need to use let to avoid this

Answer 1

It doesn`t return number 12 because hoisting works only for declarating the actual variable, not to assign it a value.

This means that your code looks like this for compilator:

function scope() {
    var hosting;
    return hosting;

    hosting=12;

}

Also please remember that everything after return is not executed.