Dart Set()
Syntax & Examples

Set constructor

The `Set` constructor in Dart creates an empty Set.

Syntax of Set

The syntax of Set.Set constructor is:

Set()

This Set constructor of Set creates an empty Set.


✐ Examples

1 Adding numbers to a Set

In this example,

  1. We create a new empty Set called `numbers`.
  2. We add integers 1, 2, and 3 to the `numbers` Set using the `add` method.
  3. We then print the `numbers` Set, which shows the elements in the Set.

Dart Program

void main() {
  Set<int> numbers = Set();
  numbers.add(1);
  numbers.add(2);
  numbers.add(3);
  print(numbers); // Output: {1, 2, 3}
}

Output

{1, 2, 3}

2 Adding characters to a Set

In this example,

  1. We create a new empty Set called `characters`.
  2. We add characters 'a', 'b', and 'c' to the `characters` Set using the `add` method.
  3. We then print the `characters` Set, which shows the characters in the Set.

Dart Program

void main() {
  Set<String> characters = Set();
  characters.add('a');
  characters.add('b');
  characters.add('c');
  print(characters); // Output: {a, b, c}
}

Output

{a, b, c}

3 Adding strings to a Set

In this example,

  1. We create a new empty Set called `words`.
  2. We add strings 'apple', 'banana', and 'cherry' to the `words` Set using the `add` method.
  3. We then print the `words` Set, which shows the strings in the Set.

Dart Program

void main() {
  Set<String> words = Set();
  words.add('apple');
  words.add('banana');
  words.add('cherry');
  print(words); // Output: {apple, banana, cherry}
}

Output

{apple, banana, cherry}

Summary

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