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Queue.Enqueue() Method in C#
The Queue.Enqueue() method in C# is used to add an object to the end of the Queue.
Syntax
The syntax is as follows −
public virtual void Enqueue (object ob);
Above, the parameter ob is the object to add to the Queue.
Example
Let us now see an example −
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
Queue<string> queue = new Queue<string>();
queue.Enqueue("Gary");
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
queue.Enqueue("Mark");
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
Console.WriteLine("Queue...");
foreach(string i in queue){
Console.WriteLine(i);
}
queue.Dequeue();
queue.Dequeue();
Console.WriteLine("Queue...UPDATED");
foreach(string i in queue){
Console.WriteLine(i);
}
Console.Write("Count of elements (updated) = "+queue.Count);
queue.Clear();
Console.Write("
Count of elements (updated AGAIN) = ");
Console.WriteLine(queue.Count);
}
}Output
This will produce the following output −
Count of elements = 8 Queue... Gary Jack Ryan Kevin Mark Jack Ryan Kevin Queue...UPDATED Ryan Kevin Mark Jack Ryan Kevin Count of elements (updated) = 6 Count of elements (updated AGAIN) = 0
Example
Let us now see another example −
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(){
Queue<string> queue = new Queue<string>();
queue.Enqueue("Gary");
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
queue.Enqueue("Mark");
Console.WriteLine("Queue...");
foreach(string i in queue){
Console.WriteLine(i);
}
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
queue.Enqueue("Jack");
queue.Enqueue("Ryan");
queue.Enqueue("Kevin");
Console.WriteLine("
Queue...UPDATED");
foreach(string i in queue){
Console.WriteLine(i);
}
Console.Write("Count of elements (Updated) = ");
Console.WriteLine(queue.Count);
queue.Dequeue();
queue.Dequeue();
Console.WriteLine("
Queue...UPDATED");
foreach(string i in queue){
Console.WriteLine(i);
}
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
queue.Clear();
Console.Write("
Count of elements (updated AGAIN) = ");
Console.WriteLine(queue.Count);
}
}Output
This will produce the following output −
Queue... Gary Jack Ryan Kevin Mark Count of elements = 5 Queue...UPDATED Gary Jack Ryan Kevin Mark Jack Ryan Kevin Count of elements (Updated) = 8 Queue...UPDATED Ryan Kevin Mark Jack Ryan Kevin Count of elements = 6 Count of elements (updated AGAIN) = 0
Updated on: 03-Dec-2019
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