In this Kotlin Tutorial, we learned how to iterate over the elements of a Set, using different looping techniques, with the help of examples. We shall iterate over the Set while this iterator has a next element, meaning iterator.hasNext() is true, and accessing the element in the while block using iterator.next(). Set.iterator() returns an iterator for this Set. In the following example, we will use While Loop to iterate over each element of the Set with the help of Set.iterator(). We can iterate through a JSONArray using a for loop: val booksJSONArray JSONArray.

Let’s look at some other ways which we can use instead. Hence, we can’t use the typical for-each pattern to iterate a JSONArray. Inside forEach() block, we can access the element using the variable name it. The JSONArray class doesn’t implement the iterator operator.

In the following example, we will use forEach() function to iterate over each element of the Set.

In the following example, we will use for loop to iterate over each element of the Set.

For each loop in kotlin