It 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.Objects stored in a Queue are inserted at one end and removed from the other.
We can Enqueue (add) items in Queue and we can Dequeue (remove from Queue ) or we can Peek (that is we will get the reference of first item ) item from Queue
Output:-
Listing 1
Listing 2
Listing 3
Listing 4
We can Enqueue (add) items in Queue and we can Dequeue (remove from Queue ) or we can Peek (that is we will get the reference of first item ) item from Queue
Operation on Queue:-
Property of Queue:-
Source code example:-
using System;
using System.Collections;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleAppDemo
{
class Program
{
static void Main(string[] args)
{
stackOperations classObj = new stackOperations();
while (true)
{
//
Console.Clear();
Console.WriteLine("\n");
Console.WriteLine("1. Add an
element");
Console.WriteLine("2. See the
First element.");
Console.WriteLine("3. Remove First element.");
Console.WriteLine("4. Display
Queue elements.");
Console.WriteLine("5.
Exit");
Console.Write("Select your
choice: ");
int choice = Convert.ToInt32(Console.ReadLine());
switch (choice)
{
case 1:
classObj.Enqueue();
break;
case 2: classObj.Peek();
break;
case 3: classObj.Dequeue();
break;
case 4: classObj.Display();
break;
case 5: System.Environment.Exit(1);
break;
}
Console.ReadKey();
}
}
}
class stackOperations
{
string item;
Queue qObj = new Queue();
public bool isEmpty()
{
if (qObj.Count == 0) return true;
return false;
}
public void Enqueue()
{
Console.Write("\nEnter a
Item\n");
item = Console.ReadLine();
qObj.Enqueue(item);
Console.WriteLine("\nItem Added
successfully!");
}
public void Dequeue()
{
if (isEmpty())
{
Console.WriteLine("Queue is
empty!");
}
else
{
qObj.Dequeue();
Console.WriteLine("Removed
Successfuly");
}
}
public void Peek()
{
if (isEmpty())
{
Console.WriteLine("Queue is
empty!");
}
else
{
Console.Write("First Item
is: {0}", qObj.Peek());
}
}
public void Display()
{
if (isEmpty())
{
Console.WriteLine("Queue is
empty!");
}
else
{
Console.Write("\nItems in
Queue are: \n");
foreach (string item in qObj)
{
Console.Write(item);
Console.Write("\n");
}
}
}
}
}
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