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Queue.Contains() Method in C#
The Queue.Contains() method in C# is used to determine whether an element is in the Queue.
Syntax
The syntax is as follows -
public virtual bool Contains (object ob);
Above, the parameter ob is the Object to locate in 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("Does the queue has element Jack? = "+queue.Contains("Jack"));
queue.Clear();
Console.Write("Count of elements (updated) = ");
Console.WriteLine(queue.Count);
}
}Output
This will produce the following output -
Count of elements = 8 Does the queue has element Jack? = True Count of elements (updated) = 0
Example
Let us now see another example -
using System;
using System.Collections.Generic;
public class Demo {
public static void Main() {
Queue<int> queue = new Queue<int>();
queue.Enqueue(100);
queue.Enqueue(200);
queue.Enqueue(300);
Console.Write("Count of elements = ");
Console.WriteLine(queue.Count);
Console.WriteLine("Does the queue has element 500? = "+queue.Contains(500));
queue.Clear();
Console.Write("Count of elements (updated) = ");
Console.WriteLine(queue.Count);
}
}Output
This will produce the following output -
Count of elements = 3 Does the queue has element 500? = False Count of elements (updated) = 0
Updated on: 03-Dec-2019
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