C# TUTORIAL

C# Variables



We will start this chapter wil the simple example below that takes in length and breadth of a rectangle and calculates and displays the area of the rectangle. Take a look at the following example. 


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
	
	    int length;
            int breadth;
            int area;

            length = 20;
            breadth = 10;

            area = length * breadth;

            Console.WriteLine("Area of Rectangle is : {0}", area);
            Console.ReadLine();


        }
    }
}

If you run the above program you should be able to see an output on the dos prompt type console window which shows the area of the rectangle. Take a look at the definition of the length, breadth and area variables. 


	
	    int length;
            int breadth;
            int area;
"Variables" are storage locations for data. You can place data into them and retrieve their contents as part of a C# expression. In the above example length, breadth and area are variables. The variables can be of any one of the several possible types. In the above example these variables are of type "int" wich stands for integer.

C# has a number of types that includes boolean, integral ( int, uint, long, char, uchar,sbyte, byte etc), Floating Point Types ( float, double, decimal), string type etc.

C# Operators


Take a look at the following line in the above example 


        length = 20;
        breadth = 10;

	area = length * breadth;
In C# Results are computed by building expressions. These expressions are built by combining variables and operators together into statements. In the above example the first two statements assign values to variables length and breadth using "=" assignment operator. In the third line in the above example the variable area is assigned a value using = and * arithmetic operator.

This completes the basic tutorial of understanding the variables and operators. In the next chapter we will present a complete list of variables and operators for your reference.