How to Initialize a Set in Dart - Step by Step Examples

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How to Initialize a Set in Dart ?

Answer

To initialize a set in Dart, you can use the Set literal or the Set constructor.

✐ Examples

1 Initialize Set with Literal

In this example,

We declare a set variable named mySet.
We initialize mySet with a set literal {} containing initial elements.
This method creates a set containing the elements provided in the literal, ensuring uniqueness of elements.
We can now manipulate mySet using set operations such as adding elements, removing elements, and checking for membership.

Dart Program

var mySet = {"apple", "banana", "orange"};

// mySet is now initialized with elements "apple", "banana", and "orange"

// Example usage:
// Add elements to the set
mySet.add("kiwi");

// Remove elements from the set
mySet.remove("banana");

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

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

Output

Is element 'apple' present in the set: true

2 Initialize Empty Set with Constructor

In this example,

We declare an empty set variable named emptySet.
We initialize emptySet using the default constructor Set().
This creates an empty set ready to be used for storing unique elements.
We can now manipulate emptySet using set operations such as adding elements, removing elements, and checking for membership.

Dart Program

var emptySet = Set<String>();

// emptySet is now initialized as an empty set

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

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

// Check if an element is present in the set
bool containsElement = emptySet.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 Initialize a Set in Dart language with well detailed examples.

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