[Java知识库]小白学java——利用Scanner做简单运算

求任意数的和以及平均数

package scanner;

import java.util.Scanner;

public class Demo2 {
    public static void main(String[] args) {
        System.out.println("输入数字：");
        Scanner scaner = new Scanner(System.in);
        double sum = 0.0;
        int m = 0;
        while (scaner.hasNextDouble()){//若不是double类型则退出循环
            double a = scaner.nextDouble();
            m++;
            sum = sum + a;
        }
        System.out.println("所求总数之和为："+sum+"\n"+"所求平均数为："+(sum/m));
        scaner.close();
    }
}
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1 2 3 4 5 6 7 8 9 10 x
所求总数之和为：55.0
所求平均数为：5.5