import java.util.Scanner;
public class main {
    public static void main(String[] args) {
  //  שאלה 1.1
  //קולטים רדיוס של מעגל
        Scanner s = new Scanner(System.in);
        System.out.println("please enter radius");
        int radius = s.nextInt();
        //print the answer we get from the functions
        System.out.println("the circle paremter for this radius is:"+calcParemeter(radius)+"and the area is:"+ calcArea(radius));
    }
//function to calc circle paremeter
        public static double calcParemeter(int a) {
            double result = 0;
            result= 2*3.14*a;
            return result;
        }
//function to calc circle area
         public static double calcArea(int b) {
            double result = 0;
            result = 3.14*power(b);
            return result;
    }
//function to calc powe - use in the other functions
    public static double power (int a){
        double result =0;
        result = a*a;
        return result;

    }

}