public class Cercle {
	public static final double PI = 3.14159265;

	public static void main(String[] args) {
		for (int i = 1; i <= 50; i++) {
			System.out.println("pour un cercle de rayon : " + i + " Perimetre:" +  perimetre(i)+ " aire:" +  aire(i));
		}
		
	}

	public static double perimetre(double rayon){
		return 2*PI*rayon;
	}

	public static double aire(double rayon){
		return PI*rayon*rayon;
	}
}