C# | Remove all objects from the Queue
Queue represents a first-in, first out collection of object. It is used when you need a first-in, first-out access of items. When you add an item in the list, it is called enqueue, and when you remove an item, it is called deque. Queue
Properties:
- Enqueue adds an element to the end of the Queue.
- Dequeue removes the oldest element from the start of the Queue.
- Peek returns the oldest element that is at the start of the Queue but does not remove it from the Queue.
- The capacity of a Queue is the number of elements the Queue can hold.
- As elements are added to a Queue, the capacity is automatically increased as required by reallocating the internal array.
- Queue accepts null as a valid value for reference types and allows duplicate elements.
Syntax :
public virtual void Clear();
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to Remove all // objects from the Queue using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Queue of strings Queue< string > myQueue = new Queue< string >(); // Inserting the elements into the Queue myQueue.Enqueue( "1st Element" ); myQueue.Enqueue( "2nd Element" ); myQueue.Enqueue( "3rd Element" ); myQueue.Enqueue( "4th Element" ); myQueue.Enqueue( "5th Element" ); myQueue.Enqueue( "6th Element" ); // 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(myQueue.Count); // Removing all elements from Queue myQueue.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(myQueue.Count); } } |
Output:
Total number of elements in the Queue are : 6 Total number of elements in the Queue are : 0
Example 2:
// C# code to Remove all // objects from the Queue using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Queue of Integers Queue< int > myQueue = new Queue< int >(); // Inserting the elements into the Queue myQueue.Enqueue(3); myQueue.Enqueue(5); myQueue.Enqueue(7); myQueue.Enqueue(9); myQueue.Enqueue(11); // 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(myQueue.Count); // Removing all elements from Queue myQueue.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(myQueue.Count); } } |
Output:
Total number of elements in the Queue are : 5 Total number of elements in the Queue are : 0
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.queue-1.clear?view=netframework-4.7.2
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