如何在java中对整数的数字求和? [英] How to sum digits of an integer in java?

问题描述

我很难找到这个问题的解决方案.我正在尝试用 Java 开发一个程序，该程序采用一个数字，例如 321，并找到数字的总和，在本例中为 3 + 2 + 1 = 6.我需要任何三位数的所有数字将它们加在一起，并使用 % 余数符号存储该值.这让我很困惑，我很感激任何人的想法.

I am having a hard time figuring out the solution to this problem. I am trying to develop a program in Java that takes a number, such as 321, and finds the sum of digits, in this case 3 + 2 + 1 = 6. I need all the digits of any three digit number to add them together, and store that value using the % remainder symbol. This has been confusing me and I would appreciate anyones ideas.

推荐答案

public static void main(String[] args) {
        int num = 321;
        int sum = 0;
        while (num > 0) {
            sum = sum + num % 10;
            num = num / 10;
        }
        System.out.println(sum); 
}

输出

6

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