Queue.Clear Method in C#
Last Updated :
11 Jul, 2025
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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:
csharp
csharp
public void Clear ();Below given are some examples to understand the implementation in a better way: Example 1:
// 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);
}
}
Output:
Example 2:
Total number of elements in the Queue are : 4 Total number of elements in the Queue are : 0
// 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);
}
}
Output:
Reference:
Total number of elements in the Queue are : 6 Total number of elements in the Queue are : 0
