Strings also have a built-in iterator. Let's for example loop through the characters of a string:
for (let elem of 'abc') {
console.log(elem); // 'a', 'b', 'c'
}
And now let's expand the string
through the spread
operator:
console.log([...'abc']); // ['a', 'b', 'c']
Given a string with a number:
let str = '12345';
Loop through the digits of this number and find their sum.