初学JAVA 累加程序

1，while循环
2，if选择
package Day05.Demo01;

import java.util.Scanner;

public class CSDN {
    public static void main(String[] args) {
        double b=0;
        while (true){
            Scanner scanner=new Scanner(System.in);
            double a=scanner.nextDouble();
                if (a==0){
                    System.out.println(b);
                   System.exit(0);
               }else{
                   b=b+a;
               }
           }
        }
    }