C# VARIABLES

A variable is nothing but a name given to a storage area that our programs can manipulate. Each variable in C# has a specific type, which determines the size and layout of the variable’s memory, the range of values that can be stored within that memory, and the set of operations that can be applied to the variable.

The basic value types provided in C# can be categorized as

C# also allows defining other value types of variablesuch as enum and reference types of variablessuch as class, which we will cover in subsequent chapters.

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

namespace Demo
{
    class Program
    {
        static void Main(string[] args)
        {

            //Syntax for variable definition in C# is
            //<data_type> < variable_list >;
            int i, j, k;
            char c, ch;
            float f, salary;
            double d;

            //You can initialize a variable at the time of definition as
            int i2 = 100;

            int d2 = 3, f2 = 5; /* initializing d and f. */
            byte z = 22; /* initializes z. */
            double pi = 3.14159; /* declares an approximation of pi. */
            char x = 'x'; /* the variable x has the value 'x'. */

            //Sample
            short aa;
            int ba;
            double ca;
            /* actual initialization */
            aa = 10;
            ba = 20;
            ca = aa + ba;
            Console.WriteLine("a = {0}, b = {1}, c = {2}", aa, ba, ca);
            Console.ReadLine();
            //a = 10, b = 20, c = 30

            //Accepting Values from User
            //The function Convert.ToInt32() converts the data entered by the user to int data
            //type, because Console.ReadLine() accepts the data in string format.
            int num;
            num = Convert.ToInt32(Console.ReadLine());
        }
    }
}