using System;

public class Program

{

    public static void Main()

    {

        int age;//declaration of variable age

        string id;//declaration of variable id

        age=18;

        id="icn2211026";

        Console.WriteLine("the age is " + age);

        Console.WriteLine(" id :" + id);

        Console.WriteLine();

//================================================================================================================//

        //declare variable to store n1

        double n1,n2,n3,n4,n5,average;

        //assign value for n1

        n1=12;

        //assign value for n2

        n2=22;

        //assign value for n3

        n3=15;

        //assign value for n4

        n4=30;

        //assign value for n5

        n5=25;

        //average/5

        average=(n1+n2+n3+n4+n5)/5;

        Console.WriteLine("the average of n1,n2,n3,n4,n5 is " + average);

        Console.WriteLine();

        //================================================================================================================//    

        //declare variable radius

        double radius ,radius2,area;

        radius=19.5;

        radius2=radius*radius;

        //declare variable area

        double pai=3.142;

        area=pai*radius2;

        Console.WriteLine("The area of circle for radius " + radius +" is " + area);

        Console.WriteLine();

        //================================================================================================================//

        //declare variable name

        string name;

        name="Haziq Imran";

        //declare variable weight

        double weight;

        weight=50;

        //declare variable height

        double height,height2;

        height=170;

        height2=height*height;

        //declare

        double bmi;

        bmi=weight/(height2);

        Console.WriteLine("The Bmi of " + name + " that has weight " + weight + " and " + height + " is " + bmi);

​

    }

}