Practice
Resources
Contests
Online IDE
New
Free Mock
Events New Scaler
Practice
Improve your coding skills with our resources
Contests
Compete in popular contests with top coders
logo
Events
Attend free live masterclass hosted by top tech professionals
New
Scaler
Explore Offerings by SCALER

Stack in C#

In this article, we will learn about the stack class in C#.

A stack represents a variable size last-in-first-out (LIFO) collection of instances of the same specified type.

Three main operations can be performed on a stack and its elements: <ul><li>Push inserts an element at the top of the Stack.</li> <li>Pop removes an element from the top of the Stack.</li> <li>Peek returns an element that is at the top of the Stack but does not remove it from the Stack.<li> </ul> <h4>Creating a Stack</h4> <p>We create a Stack in C# using the following syntax:
Stack<T> st = new Stack<T>();
<T> here denotes any datatype which we want to create a stack of.


Properties of Stack

  • Count: This property gets the number of elements present in the stack.

Methods of Stack

  • Push(T): Inserts an object at the top of the Stack.</li>
  • Pop(): Removes and returns the object at the top of the Stack.</li>
  • Peek(): Returns the object at the top of the Stack without removing it.</li>
  • Contains(T): Determines whether an element is in the Stack.</li>
  • Clear(): Removes all objects from the Stack.</li> </ul>

    Stack Operation Examples:

    Different Stack operations are demonstrated in the example below:

    using System;
    using System.Collections.Generic;
    namespace StackDemo {
        class Example {
            static void Main(string[] args) {
                Stack  st = new Stack ();
                st.Push(5);          
                st.Push(5);
                st.Push(2);
                st.Push(9);
                
                Console.WriteLine(st.Count);        // Prints 4, the size of stack
                
                Console.WriteLine(st.Peek());       // Prints 9, the top element
                
                Console.WriteLine(st.Pop());       // Prints 9, then removes it
                Console.WriteLine(st.Pop());       // Prints 2, then removes it
                
                Console.WriteLine(st.Contains(5));  // Checks if 5 is present
                Console.WriteLine(st.Contains(2));  // Checks if 2 is present
            }
        }
    }
    </code></pre>
    

    Output:

    4
    9
    9
    2
    True
    False

    Task

    In the editor below, perform the different tasks as directed.

Start solving Stack in C# on Interview Code Editor
Hints
  • Complete Solution

Discussion


Loading...
Click here to start solving coding interview questions
Free Mock Assessment
Fill up the details for personalised experience.
Phone Number *
OTP will be sent to this number for verification
+1 *
+1
Change Number
Graduation Year *
Graduation Year *
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
*Enter the expected year of graduation if you're student
Current Employer
Company Name
College you graduated from
College/University Name
Job Title
Job Title
Engineering Leadership
Software Development Engineer (Backend)
Software Development Engineer (Frontend)
Software Development Engineer (Full Stack)
Data Scientist
Android Engineer
iOS Engineer
Devops Engineer
Support Engineer
Research Engineer
Engineering Intern
QA Engineer
Co-founder
SDET
Product Manager
Product Designer
Backend Architect
Program Manager
Release Engineer
Security Leadership
Database Administrator
Data Analyst
Data Engineer
Non Coder
Other
Please verify your phone number
Edit
Resend OTP
By clicking on Start Test, I agree to be contacted by Scaler in the future.
Already have an account? Log in
Free Mock Assessment
Instructions from Interviewbit
Start Test