03.OperatorsExpressionsStatements/07.PointInCircle

//Problem 7.    Point in a Circle
//Write an expression that checks if given point (x,  y) is inside a circle K({0, 0}, 2).

using System;

class PointInCircle
{
    static void Main()
    {
        Console.WriteLine("Is point (x,y) inside a circle K((0,0),2) ? ");
        //Enter x
        Console.Write("Please, Enter point(x,y):  x=");
        double x = double.Parse(Console.ReadLine());
        //Enter y
        Console.Write("Please, Enter point(x,y):  y=");
        double y = double.Parse(Console.ReadLine());
        int radiusCircle = 2;
        //Calculate the distance from center of circle(0,0) to the point(x,y)
        double pointDistance = Math.Sqrt((x*x)+(y*y));
        //Check the point(x,y)
        bool checkPoint=(pointDistance <= radiusCircle);
        if (checkPoint)
        {
            Console.WriteLine("{0}.The Point({1},{2}) is inside a circle K((0,0),2).",checkPoint,x,y);
        }
        else
        {
            Console.WriteLine("{0}.The Point({1},{2}) is outside a circle K((0,0),2).",checkPoint, x, y);
        }
    }
}