Dart Set isEmpty
Syntax & Examples

Set.isEmpty property

The `isEmpty` property in Dart returns true if there are no elements in the set.

Syntax of Set.isEmpty

The syntax of Set.isEmpty property is:

 bool isEmpty

This isEmpty property of Set returns true if there are no elements in this collection.

Return Type

Set.isEmpty returns value of type bool.


✐ Examples

1 Empty Set of Numbers

In this example,

  1. We create an empty Set numbers.
  2. We check if the set is empty using the isEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<int> numbers = {};
  bool result = numbers.isEmpty;
  print('Is the set empty? $result');
}

Output

Is the set empty? true

2 Non-Empty Set of Characters

In this example,

  1. We create a Set characters containing some characters.
  2. We check if the set is empty using the isEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<String> characters = {'a', 'b', 'c'};
  bool result = characters.isEmpty;
  print('Is the set empty? $result');
}

Output

Is the set empty? false

3 Empty Set of Strings

In this example,

  1. We create an empty Set strings.
  2. We check if the set is empty using the isEmpty property.
  3. We print the result to standard output.

Dart Program

void main() {
  Set<String> strings = {};
  bool result = strings.isEmpty;
  print('Is the set empty? $result');
}

Output

Is the set empty? true

Summary

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