How to check if a Specific Item is present in the Set in Dart - Step by Step Examples

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How to check if a Specific Item is present in the Set in Dart ?

Answer

To check if a specific item is present in a Set in Dart, you can use the contains method of the Set class.

✐ Examples

1 Check if an Item is Present in a Set of Integers

In this example,

We create a Set named numbers and initialize it with some integer elements.
We define an integer variable itemToCheck with the value of the item we want to check for.
We use the contains method of the numbers set to check if itemToCheck is present in the set.
The contains method returns a boolean value: true if the item is present, and false if it is not.
We print the result to the console to verify whether the item is present in the set.

Dart Program

void main() {
  Set<int> numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  int itemToCheck = 5;
  bool containsItem = numbers.contains(itemToCheck);
  print('Does the set contain $itemToCheck? $containsItem');
}

Output

Does the set contain 5? true

2 Check if an Item is Present in a Set of Strings

In this example,

We create a Set named fruits and initialize it with some string elements.
We define a string variable itemToCheck with the value of the item we want to check for.
We use the contains method of the fruits set to check if itemToCheck is present in the set.
The contains method returns a boolean value: true if the item is present, and false if it is not.
We print the result to the console to verify whether the item is present in the set.

Dart Program

void main() {
  Set<String> fruits = {'apple', 'banana', 'cherry', 'date', 'fig'};
  String itemToCheck = 'cherry';
  bool containsItem = fruits.contains(itemToCheck);
  print("Does the set contain '$itemToCheck'? $containsItem");
}

Output

Does the set contain 'cherry'? true

Summary

In this tutorial, we learned How to check if a Specific Item is present in the Set in Dart language with well detailed examples.

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