The Stack class is implemented in C# using Push and Pop operations.
Stack is used in C# to represent a last-in-first-out collection of objects. The following are the methods of the Stack class-
Methods and descriptions | |
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public virtual void Clear();Removes all elements from the stack. | |
public virtual bool Contains(object obj);Determine whether the element is in in the stack. | |
public virtual object Peek();Returns the object at the top of the Stack Don't delete it. | |
Public virtual object Pop();Delete and return the top of the stack object. | |
public virtual void Push(object obj);Insert at the top of the stack an object.
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Public virtual object[] ToArray(); strong>Copy Stack to new array. |
Push operation adds an element. p>
Stack st = new Stack(); st.Push('A'); st.Push('B'); st.Push('C'); st.Push('D');
The pop operation removes elements from the stack.
st.Push('P'); st.Push('Q');
using System; using System.Collections; namespace CollectionsApplication { class Program { static void Main(string[] args) { Stack st = new Stack(); st.Push('A'); st.Push('B'); st.Push('C'); st.Push('D'); Console.WriteLine("Current stack: "); foreach (char c in st) { Console.Write(c + " "); } Console.WriteLine(); st.Push('P'); st.Push('Q'); Console.WriteLine("The next poppable value in stack: {0}", st.Peek()); Console.WriteLine("Current stack: "); foreach (char c in st) { Console.Write(c + " "); } Console.WriteLine(); Console.WriteLine("Removing values...."); st.Pop(); st.Pop(); st.Pop(); Console.WriteLine("Current stack: "); foreach (char c in st) { Console.Write(c + " "); } } } }
Current stack: D C B A The next poppable value in stack: Q Current stack: Q P D C B A Removing values.... Current stack: C B A
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