Dart List iterator
Syntax & Examples

Syntax of List.iterator

The syntax of List.iterator property is:

 Iterator<E> iterator

This iterator property of List a new Iterator that allows iterating the elements of this Iterable.

Return Type

List.iterator returns value of type Iterator<E>.

✐ Examples

1 Iterate over a list of numbers

In this example,

We create a list numbers containing integers.
We then get an Iterator for the list using the iterator property.
We use a while loop with moveNext() to iterate over the list.
Within the loop, we print each element using iter.current.

Dart Program

void main() {
  List<int> numbers = [1, 2, 3, 4, 5];
  Iterator<int> iter = numbers.iterator;
  while (iter.moveNext()) {
    print(iter.current);
  }
}

Output

2 Iterate over a set of characters

In this example,

We create a set characters containing strings.
We then get an Iterator for the set using the iterator property.
We use a while loop with moveNext() to iterate over the set.
Within the loop, we print each element using iter.current.

Dart Program

void main() {
  Set<String> characters = {'a', 'b', 'c'};
  Iterator<String> iter = characters.iterator;
  while (iter.moveNext()) {
    print(iter.current);
  }
}

Output

a
b
c

3 Iterate over an iterable of strings

In this example,

We create an iterable strings containing strings.
We then get an Iterator for the iterable using the iterator property.
We use a while loop with moveNext() to iterate over the iterable.
Within the loop, we print each element using iter.current.

Dart Program

void main() {
  Iterable<String> strings = ['apple', 'banana', 'cherry'];
  Iterator<String> iter = strings.iterator;
  while (iter.moveNext()) {
    print(iter.current);
  }
}

Output

apple
banana
cherry

Summary

In this Dart tutorial, we learned about iterator property of List: the syntax and few working examples with output and detailed explanation for each example.