Queue.Clear Method in C#

This method is used to remove the objects from the Queue. This method is an O(n) operation, where n is the total count of elements. And this method comes under System.Collections namespace.

Syntax:

public void Clear ();

Below given are some examples to understand the implementation in a better way:



Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// C# code to illustrate the
// Queue.Clear Method
using System;
using System.Collections;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a Queue
        Queue q = new Queue();
  
        // Inserting the elements into the Queue
        q.Enqueue(1);
        q.Enqueue(2);
        q.Enqueue(2);
        q.Enqueue(4);
  
        // Displaying the count of elements
        // contained in the Queue before
        // removing all the elements
        Console.Write("Total number of elements "+
                           "in the Queue are : ");
  
        Console.WriteLine(q.Count);
  
        // Removing all elements from Queue
        q.Clear();
  
        // Displaying the count of elements
        // contained in the Queue after
        // removing all the elements
        Console.Write("Total number of elements"+
                         " in the Queue are : ");
  
        Console.WriteLine(q.Count);
    }
}

chevron_right


Output:

Total number of elements in the Queue are : 4
Total number of elements in the Queue are : 0

Example 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// C# code to illustrate the
// Queue.Clear Method
using System;
using System.Collections;
  
class GFG {
  
    // Driver code
    public static void Main()
    {
  
        // Creating a Queue
        Queue q = new Queue();
   
        // Inserting the elements into the Queue
        q.Enqueue("C");
        q.Enqueue("C++");
        q.Enqueue("Java");
        q.Enqueue("PHP");
        q.Enqueue("HTML");
        q.Enqueue("Python");
  
        // Displaying the count of elements
        // contained in the Queue before
        // removing all the elements
        Console.Write("Total number of elements "+
                           "in the Queue are : ");
  
        Console.WriteLine(q.Count);
  
        // Removing all elements from Queue
        q.Clear();
  
        // Displaying the count of elements
        // contained in the Queue after
        // removing all the elements
        Console.Write("Total number of elements "+
                           "in the Queue are : ");
  
        Console.WriteLine(q.Count);
    }
}

chevron_right


Output:

Total number of elements in the Queue are : 6
Total number of elements in the Queue are : 0

Reference:



My Personal Notes arrow_drop_up

Contented with little yet wishing for more

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.