(圓的面積和周長)編寫程式，使用以下公式計算並顯示半徑為5.5的圓的面積和周長。

周長 = 2 × 半徑 × π
面積 = 半徑 × 半徑 × π

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package dome1_8;

/**
 *
 * @author Administrator
 */
 

public class Dome1_8 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        double radius = 5.5;//半徑
        double pi = 3.14;
        System.out.println("周長:" + (2 * radius * pi));
        System.out.
 
println("面積:" + (radius * radius * pi));
    }
    
}