How to check if Set contains given Element in Dart?

Dart – Check if Set contains Specific Element

To check if specified element is present in a Set in Dart, call contains() method on this Set and pass the search element as argument to it. Set.contains(element) method returns true if the element is present, or false if not.

Syntax

The syntax to check if given element is present in mySet using contains() method is

mySet.contains(element)

Examples

In the following program, we take a Set mySet with some elements, and check if the element 'banana' is present in this Set.

main.dart

void main() {
  var mySet = {'apple', 'banana', 'cherry'};
  var element = 'banana';

  if (mySet.contains(element)) {
    print('Given element is present in the set.');
  } else {
    print('Given element is not present in the set.');
  }
}

Output

Given element is present in the set.

Now, let us check if the element 'mango', is present in the Set or not.

main.dart

void main() {
  var mySet = {'apple', 'banana', 'cherry'};
  var element = 'mango';

  if (mySet.contains(element)) {
    print('Given element is present in the set.');
  } else {
    print('Given element is not present in the set.');
  }
}

Output

Given element is not present in the set.

Conclusion

In this Dart Tutorial, we learned how to check if a specified element is present a Set in Dart programming, with examples.