Home  >  Article  >  Java  >  Java small test seeks to complete the number within 1000

Java small test seeks to complete the number within 1000

王林
王林forward
2020-12-08 15:12:473112browse

Java small test seeks to complete the number within 1000

Test question:

If a number is exactly equal to the sum of its factors, the number is called a perfect number. Example 6=1+23. Program to find all perfect numbers within 1000.

(Learning video sharing: java teaching video)

Idea:

  • for loop, Assign i a value of 1~1000

  • Find the numbers that can divide i and add them

  • After adding If the sum of the numbers is equal to i, then output i

Implementation code:

package com.thz.hnstc.test01;
/*
* @author NanTang
* */
public class PerfectNumber {
    public static void main(String[] args) {
        for (int i = 1; i < 1000; i++) {
            int sum = 0;
            for (int j = 1; j < i; j++) {
                if(i % j == 0)
                    sum += j;
            }
            if(sum == i)
                System.out.println("完数:"  + i);
        }
    }
}

Running result:

完数:6
完数:28
完数:496

Related recommendations: Java introductory tutorial

The above is the detailed content of Java small test seeks to complete the number within 1000. For more information, please follow other related articles on the PHP Chinese website!

Statement:
This article is reproduced at:csdn.net. If there is any infringement, please contact admin@php.cn delete