Stack.Push() Method in C#


The Stack.Push() method in C# is used to insert an object at the top of the Stack.

Syntax

The syntax is as follows −

public virtual void Push (object ob);

Above, the parameter ob is the object to push onto the stack.

Example

Let us now see an example −

 Live Demo

using System;
using System.Collections;
public class Demo {
   public static void Main() {
      Stack stack = new Stack();
      stack.Push(150);
      stack.Push(300);
      stack.Push(500);
      stack.Push(750);
      stack.Push(1000);
      stack.Push(1250);
      stack.Push(1500);
      stack.Push(2000);
      stack.Push(2500);
      Console.WriteLine("Stack elements...");
      foreach(int val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements = "+stack.Count);
      stack.Push(3000);
      stack.Push(3500);
      stack.Push(4000);
      Console.WriteLine("
Stack elements...updated");       foreach(int val in stack) {          Console.WriteLine(val);       }       Console.WriteLine("
Count of elements (updated) = "+stack.Count);       Stack stack2 = (Stack)stack.Clone();       Console.WriteLine("
Stack elements...cloned");       foreach(int val in stack2) {          Console.WriteLine(val);       }       Console.Write("Count of elements in cloned stack(updated) = "+stack2.Count);    } }

Output

This will produce the following output −

Stack elements...
2500
2000
1500
1250
1000
750
500
300
150
Count of elements = 9

Stack elements...updated
4000
3500
3000
2500
2000
1500
1250
1000
750
500
300
150
Count of elements (updated) = 12

Stack elements...cloned
4000
3500
3000
2500
2000
1500
1250
1000
750
500
300
150
Count of elements in cloned stack(updated) = 12

Example

Let us now see another example −

 Live Demo

using System;
using System.Collections;
public class Demo {
   public static void Main() {
      Stack stack = new Stack();
      stack.Push("Inspiron");
      stack.Push("Alienware");
      stack.Push("Projectors");
      stack.Push("Monitors");
      stack.Push("XPS");
      stack.Push("Laptop");
      stack.Push("Notebook");
      Console.WriteLine("Stack elements...");
      foreach(string val in stack) {
         Console.WriteLine(val);
      }
      Console.WriteLine("Count of elements = "+stack.Count);
      stack.Push("Ultrabook");
      stack.Push("Cameras");
      stack.Push("Keyboards");
      Console.WriteLine("
Stack elements...updated");       foreach(string val in stack) {          Console.WriteLine(val);       }       Console.WriteLine("
Count of elements (updated) = "+stack.Count);       stack.Clear();       Console.Write("Count of elements (updated) = "+stack.Count);    } }

Output

This will produce the following output −

Stack elements...
Notebook
Laptop
XPS
Monitors
Projectors
Alienware
Inspiron
Count of elements = 7

Stack elements...updated
Keyboards
Cameras
Ultrabook
Notebook
Laptop
XPS
Monitors
Projectors
Alienware
Inspiron
Count of elements (updated) = 10
Count of elements (updated) = 0

Updated on: 04-Dec-2019

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