Hey, i wanted to print a set, the amount of times that there is items in the set. But the outcomes are the same, so: CBA,CBA,CBA or ACB,ACB,ACB but i want that every print is unique. Here is the sample code:

let chars = Set(["A", "B", "C"])
for char in chars {
    print(chars)
}

check this article When to use a set rather than an array

Sets do not have a defined order, but they are only ever reordered when you add or remove items. So when you create your Set here:

let chars = Set(["A", "B", "C"])

the order of the elements is, no pun intended, set (though not necessarily in the order the elements are defined) and will not change as you loop through it until/unless you add/remove items.

If you want to change the order of the items when they are printed each time through the loop, you should call shuffled() on your Set, like this:

let chars = Set(["A", "B", "C"])
for char in chars {
    print(chars.shuffled())
}

Note two things:

1. This doesn't actually change the order the items are stored in the original Set because this just returns a new Array with the elements in a different order while leaving chars untouched.
2. You don't actually need a Set here to achieve this; an Array would work just as well. If you need a Set for other reasons because of stuff going on elsewhere in your code, fine, but it's not necessary for this example.