UNIT 3 Array in C#

 

 Structure of C#

using System;             // Gives access to Console and other basic features 

namespace MyFirstProgram      // Defines a namespace

{

    class Program             // Main class of the program

    {

        static void Main(string[] args)  // Main method, starting point

        {

            Console.WriteLine("Hello, World!"); // Prints output to screen

        }

    }

}

•  using System;

This line allows your program to use predefined classes and functions in the System namespace.
For example, Console.WriteLine() is part of System.

It's like importing built-in tools so you can use them in your code.

•  namespace MyFirstProgram

A namespace is like a container for your classes. It helps organize code and avoid naming conflicts when your program gets bigger.

 Think of it like putting files in folders.

•  class Program

All C# code must be written inside a class. Here, the class is named Program.
A class is a blueprint that contains data (variables) and actions (methods or functions).

It's like a box that holds your actual code logic.

•  static void Main(string[] args)

This is the entry point of the C# program. When you run the program, execution starts from this method.

·         static: You don’t need to create an object to run this method.

·         void: This means the method doesn’t return any value.

·         Main: The name of the method where the program starts.

·         string[] args: This is used to take command-line arguments (optional for now).

 It tells the computer: "Start here!"

•  Console.WriteLine("Hello, World!");

This line displays text on the screen.

·         Console: A built-in class for input/output.

·         WriteLine(): A method that prints the given text and moves to a new line.

This is the actual action of your program.