C# | Check if a Stack contains an element
Stack represents a last-in, first out collection of object.
Stack<T>.Contains(Object) Method is used to check whether an element is in the Stack<T> or not.
Syntax:
public virtual bool Contains(object obj);
Return Value: The function returns True if the element exists in the Stack<T> and returns False if the element doesn’t exist in the Stack.
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to Check if a Stack // contains an element using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Stack of strings Stack<string> myStack = new Stack<string>(); // Inserting the elements into the Stack myStack.Push("Beginner"); myStack.Push("Beginner Classes"); myStack.Push("Noida"); myStack.Push("Data Structures"); myStack.Push("w3wiki"); // Checking whether the element is // present in the Stack or not // The function returns True if the // element is present in the Stack, else // returns False Console.WriteLine(myStack.Contains("w3wiki")); } } |
Output:
True
Example 2:
// C# code to Check if a Stack // contains an element using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a Stack of Integers Stack<int> myStack = new Stack<int>(); // Inserting the elements into the Stack myStack.Push(5); myStack.Push(10); myStack.Push(15); myStack.Push(20); myStack.Push(25); // Checking whether the element is // present in the Stack or not // The function returns True if the // element is present in the Stack, else // returns False Console.WriteLine(myStack.Contains(7)); } } |
Output:
False
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.stack.contains?view=netframework-4.7.2