Dart Set clear()
Syntax & Examples

Set.clear() method

The `clear` method in Dart removes all elements from a Set.

Syntax of Set.clear()

The syntax of Set.clear() method is:

 void clear()

This clear() method of Set removes all elements in the set.

Return Type

Set.clear() returns value of type void.


✐ Examples

1 Clearing a set of integers

In this example,

  1. We create a Set variable numbers containing integer elements.
  2. We print the set before clearing it.
  3. We use the clear() method to remove all elements from the set.
  4. We print the set after clearing it to standard output.

Dart Program

void main() {
  Set<int> numbers = {1, 2, 3, 4, 5};
  print('Before clearing: $numbers');
  numbers.clear();
  print('After clearing: $numbers');
}

Output

Before clearing: {1, 2, 3, 4, 5}
After clearing: {}

2 Clearing a set of strings

In this example,

  1. We create a Set variable fruits containing string elements.
  2. We print the set before clearing it.
  3. We use the clear() method to remove all elements from the set.
  4. We print the set after clearing it to standard output.

Dart Program

void main() {
  Set<String> fruits = {'apple', 'banana', 'orange', 'kiwi'};
  print('Before clearing: $fruits');
  fruits.clear();
  print('After clearing: $fruits');
}

Output

Before clearing: {apple, banana, orange, kiwi}
After clearing: {}

Summary

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