java - day08 - PrimeNumLoop

质数循环查找

 package day07_addition;

 //范围查找质数
 public class PrimeNumLoop {
     public static void main(String[] args){
         int counter = 0;
         int number = 0;

         //2~100循环查找
         for(int n=2;n<=100;n++){
             boolean flag = true;

             //单个数字查找质数
             for(int i=2;i<n;i++){
                 if(n%i == 0){
                     flag = false;
                     break;
                 }
             }
                 //判断质数
                 if(flag){
                     System.out.print(n+" ");
                     counter++;
                     number++;
                 }
                 if(counter%10 == 0){
                     System.out.println();
                 }
         }
         System.out.println();
         System.out.println("共计:"+number);
     }
 }