How to create an Empty Set in Dart - Step by Step Examples

◀ Previous Next ▶

How to create an Empty Set in Dart ?

Answer

To create an empty set in Dart, you can use the Set data structure without specifying any initial elements.

✐ Examples

1 Create Empty Set

In this example,

We declare a variable named emptySet of type Set<int> to indicate that it will hold integer values.
We initialize emptySet by directly assigning it the Set constructor without passing any initial elements.
This creates an empty set ready to be used for storing unique integer values.
We can perform set operations such as adding elements, removing elements, and checking for membership on emptySet.

Dart Program

void main() {
  // Declare an empty set
  Set<int> emptySet = Set<int>();

  // emptySet is now ready to be used as an empty set

  // Example usage:
  // Add elements to the set
  emptySet.add(5);

  // Remove elements from the set
  emptySet.remove(5);

  // Check if an element is present in the set
  bool containsElement = emptySet.contains(5);

  print('Is element 5 present in the set: $containsElement');
}

Output

Is element 5 present in the set: false

2 Create Empty Set using Set Literal

In this example,

We declare another variable named anotherEmptySet of type Set<String> to indicate that it will hold string values.
We initialize anotherEmptySet by directly assigning it an empty set literal {}, representing an empty set in Dart.
This method provides a concise way to create an empty set without invoking the constructor explicitly.
We can manipulate anotherEmptySet using set operations such as adding elements, removing elements, and checking for membership.

Dart Program

void main() {
  // Declare an empty set using set literal
  Set<String> anotherEmptySet = {};

  // anotherEmptySet is now ready to be used as an empty set

  // Example usage:
  // Add elements to the set
  anotherEmptySet.add('apple');

  // Remove elements from the set
  anotherEmptySet.remove('apple');

  // Check if an element is present in the set
  bool containsElement = anotherEmptySet.contains('apple');

  print('Is element 'apple' present in the set: $containsElement');
}

Output

Is element 'apple' present in the set: false

Summary

In this tutorial, we learned How to create an Empty Set in Dart language with well detailed examples.

◀ Previous Next ▶

Dart Tutorials

Dart How-Tos

How to create an Empty Set in Dart - Step by Step Examples

How to create an Empty Set in Dart ?

Answer

✐ Examples

1 Create Empty Set

Dart Program

Output

2 Create Empty Set using Set Literal

Dart Program

Output

Summary

More Dart Sets Tutorials