How to create an Empty Set in C# - Step by Step Examples

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How to create an Empty Set in C# ?

Answer

To create an empty set in C#, you can use the HashSet class without passing any initial elements.

✐ Examples

1 Create Empty Set

In this example,

We import the necessary namespace for HashSet by including the statement using System.Collections.Generic;.
We declare a HashSet variable named emptySet. The angle brackets denote the type of elements the set will hold, denoted by T.
We initialize emptySet by instantiating it using the default constructor new HashSet(), without passing any initial elements.
The HashSet class provides methods to add, remove, and check for the presence of elements in the set.

C# Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        // Declare an empty HashSet
        HashSet<int> emptySet = new HashSet<int>();

        // emptySet is now ready to be used as an empty set

        // Example usage:
        // Add elements to the set
        emptySet.Add(5);

        // Remove elements from the set
        emptySet.Remove(5);

        // Check if an element is present in the set
        bool containsElement = emptySet.Contains(5);

        Console.WriteLine("Is element 5 present in the set: " + containsElement);
    }
}

Output

Is element 5 present in the set: False

Summary

In this tutorial, we learned How to create an Empty Set in C# language with well detailed examples.