C Sharp ARTICLE

History of C Sharp

C Sharp programming language was designed by Anders Hejlsberg from Microsoft in 2000 and was later approved as an international standard by Ecma (ECMA-334) in 2002 and ISO/IEC (ISO/IEC 23270) in 2003. Microsoft introduced C Sharp along with .NET Framework and Visual Studio, both of which were closed-source.

C Sharp Introduction

What is C Sharp?

• C Sharp (pronounced "See Sharp") is a modern, object-oriented, and type-safe programming language.
• C Sharp enables developers to build many types of secure and robust applications that run in .NET.
• C Sharp has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers.
• C# has added features to support new workloads and emerging software design practices.

C Sharp Syntax

• we can use classes from the System namespace.
• A blank line. C# ignores white space.
• namespace is used to organize your code, and it is a container for classes and other namespaces.
• The curly braces {} marks the beginning and the end of a block of code.
• class is a container for data and methods, which brings functionality to your program. Every line of code that runs in C# must be inside a class.
• Another thing that always appear in a C# program, is the Main method. Any code inside its curly brackets {} will be executed.
• Console is a class of the System namespace, which has a WriteLine() method that is used to output/print text.
• Note : Every C Sharp statement ends with a semicolon ;

Example:

        
          using System;

          namespace HelloWorld
          {
            class Program
           {
             static void Main ( string[] args )
              {
                Console.WriteLine ( "Welcome to BUIE-Learning" ) ;
               }
            }
           }
        
      

        
          Result: Welcome to BUIE-Learning
        
      

C Sharp Variables

• In C Sharp, there are different types of variables, for example:
• int: stores integers (whole numbers), without decimals, such as 123 or -123
• char: stores single characters, such as 'a' or 'B'.
• string: stores text, such as "BUIE Learning".
• double: stores floating point numbers, with decimals.
• bool: stores values with two states: true or false

Example:

        
          int num = 5;
          double DoubleNum = 5.99D;
          char C = 'D';
          bool Bool = true;
          string myText = "Welcome";
         
    

Example of C sharp programming

Add Two Numbers

      
        static void Main(string[] args )
        {
            int num1, num2, sum;
            Console.WriteLine (" How to Calculate the sum of two numbers:");
            Console.WriteLine(" Input number 1: " );
            num1 = Convert.ToInt32(  Console.ReadLine());
            Console.Write(" Input number 2: " );
            num2 = Convert.ToInt32(Console.ReadLine() );
            sum = num1 + num2;
            Console.Write(" {0} + {1} = {2}",num1,num2,sum);

            Console.ReadKey();
        }
      
    

      
        Result: 
        How to Calculate the sum of two numbers:
        Input number 1: 5
        Input number 2: 10
        5 + 10 = 15