Lesson 2: Input and Output in C#

Input and Output

WRITE A PROGRAM THAT ASKS A USER WHAT HIS/HER NAME IS AND THEN DISPLAYS THE FOLLOWING TEXT TO THE CONSOLE:

                         Hello, <Name>

Brief Notes: 

• In C#, every code is written inside a class. A class is a blueprint for creating an object; an object is an instance of a class.
• The execution of any C# program starts in a special method called the main method.
• The main method has the following syntax:

                

• To output text to the console we use Write or WritleLine method of the Console class; for example, 
• Console.Write("Enter Your Name:");
• Above code outputs the text Enter Your Name to the console.
• To input data from the console, for instance, name, we first create a variable (a storage location in memory to hold the name) and then we use the ReadLine method of the Console class. For  example: 
• string name = Console.ReadLine();
• Every statement in C# ends in semicolon (;)

Note: We will discuss variables, classes and objects in the coming lessons.

Here is the complete program:

/* 

  * Author: Temesghen Tekeste 

  * email: mail.temesghen.tekeste@gmail.com 

  * */

using System;

namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.Write("What is your name?");

            string name = Console.ReadLine();

            Console.WriteLine();

            Console.WriteLine("Hello, " + name);

            Console.WriteLine("Press any key to exit ...");

            Console.ReadKey();

        }

    }

}

Download Source Code

OUTPUT: