Queue.Peek() method with example in C#

C# Queue.Peek() method: Here, we are going to learn about the Peek() method of Queue class in C#.
Submitted by IncludeHelp, on March 30, 2019

C# Queue.Peek() method

Queue.Peek() method is used to get the object at the beginning of the Queue without removing it.

Syntax:

    Object Queue.Peek();

Parameters: None

Return value: Object – it returns an object/element from the beginning of the Queue.

Example:

    declare and initialize a Queue:
    Queue que = new Queue();   

    insertting elements:
    que.Enqueue(100);
    que.Enqueue(200);
    que.Enqueue(300);
    que.Enqueue(400);
    que.Enqueue(500);
    
    printing element from the beginning of Queue:
    que.Peek();

    Output:
    100

C# example to get an object/element from the beginning of the Queue using Queue.Peek() method

using System;
using System.Text;
using System.Collections;

namespace Test
{
    class Program
    {
        //function to print queue elements
        static void printQueue(Queue q)
        {
            foreach (Object obj in q)
            {
                Console.Write(obj + " ");
            }
            Console.WriteLine();
        }

        static void Main(string[] args)
        {
            //declare and initialize a Queue
            Queue que = new Queue();

            //insertting elements
            que.Enqueue(100);
            que.Enqueue(200);
            que.Enqueue(300);
            que.Enqueue(400);
            que.Enqueue(500);

            //printing queue elements
            Console.WriteLine("Queue elements are...");
            printQueue(que);

            //printing element from the beginning of Queue
            Object item = que.Peek();
            Console.WriteLine("Queue's beginning element: " + item);

            //hit ENTER to exit
            Console.ReadLine();
        }
    }
}

Output

Queue elements are...
100 200 300 400 500
Queue's beginning element: 100