using System;

public class Program

{

    public static void Main()

    {

        int a;

        double Area, b1, b2, h;

        Console.WriteLine("Enter first base of trapezoid:");

        b1 = Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("Enter second base of trapezoid:");

        b2 = Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("Enter height of trapezoid:");

        h = Convert.ToDouble(Console.ReadLine());

        Area = 0.5 * (b1 + b2) * h;

        //while loop

        Console.WriteLine("While Loop");

        a = 1;

        while (a<=10)

        {

            Console.WriteLine("The area of trapezoid is " + Area);

            a++;

        }

        //do=while loop

        Console.WriteLine("Do-While Loop");

        a = 1;

        do

        {

            Console.WriteLine("The area of trapezoid is " + Area);

            a++;

        }

        while (a<=10);

    }

}