Write A C++ Program To Print A Hello World!

This is a typical C++ Hello World program. Here's the explanation what I have used in this program. In first two lines, I have used iostream and conio header's files of C++. In line no. 3, I have declared C++ main class that is void main(). After that I have used clrscr(); which is used to clear the screen of a C++ window. In line no. 6,7 and 8, I have used cout which is used to print a message. In C++, endl is used to end a line and getch(); is used to stop a screen of a C++ window so that a user can see what message got printed on window.

   1:  #include<iostream.h>

   2:  #include<conio.h>

   3:  void main()

   4:  {

   5:  clrscr();

   6:  cout<<"Hello World!";

   7:  cout<<endl;

   8:  cout<<"This is my first C++ program.";

   9:  getch();

  10:  }

Output of the program is :

Hello World! 

This is my first C++ program.

Write A C# Program To Print A Hello World!

In below example, I am only showing two Hello World messages. In line no. 18 and 24, I have used two buttons to perform the task. First, I have displayed the Hello World message in a Label control of C#.Net and in second I have used MessageBox.Show method to display the Hello World message in a pop up tiny window. Just copy and past this code in your C# page and hit F5 to run the program. This program in only intended for Visual Studio 2005 and upgraded versions.

Hello World

   1:  using System;

   2:  using System.Collections.Generic;

   3:  using System.ComponentModel;

   4:  using System.Data;

   5:  using System.Drawing;

   6:  using System.Text;

   7:  using System.Windows.Forms;

   8:   

   9:  namespace BlogWorld___HelloWorld

  10:  {

  11:      public partial class Form1 : Form

  12:      {

  13:          public Form1()

  14:          {

  15:              InitializeComponent();

  16:          }

  17:   

  18:          private void btnClickMe_Click(object sender, EventArgs e)

  19:          {

  20:              //To print a "Hello World" message on a Label

  21:              lblMsg.Text = "Hello World!";

  22:          }

  23:   

  24:          private void btnClickMsg_Click(object sender, EventArgs e)

  25:          {

  26:              //To print a "Hello World" message on Message Box

  27:              MessageBox.Show("Hello World!");

  28:          }

  29:      }

  30:  }