Looping through Set collections

Let's have some Set collection:

javascriptlet set = new Set;

set.add(1);
set.add(2);
set.add(3);

Let's loop through it:

javascriptfor (let elem of set) {
  console.log(elem);
}
Задание 1

Create a Set collection with some numbers. Loop through this collection and find the sum of its elements.