Variable:

• A variable is a named memory location that can be assigned a value.
• The value of variable can be changed during the execution of the program.

Program using two variable:

using System; // using is the variable and Sysytem is the Namespace

class program2 // program2 is the name the class

{

public static void Main()

{

int a; // This declares the variable1

int b; // This declares the variable2

a=50; // assign 50 to a

Console.WriteLine("The value of a:"+a); //the + sign causes the value of a to be displayed.

b=a*2; // assigned a multiplied by 2 to b

Console.Write("The value of b:"); //write() is to display the strings it contains and the next output will be generated in sameline.

Console.Writeline(b);

}

}

output:

The value of a: 50

The value of b: 100