循环结构进阶

public class xia2 {

    public static void main(String[] args) {
        //while---while
        while( 条件1 ){
            
            while( 条件2 ) {
                
            }
        }
        //do---whlie
        do{
            
            do{
                
            }while( 条件1 );
        }while( 条件2 );
        //for与for
        for( 条件 1 ) {
            for( 条件2 ){
                
            }
        }
        //while与while
        while(条件 1){
            
            for(条件2){
                
            }
        }
    }
}

import java.util.Scanner;


public class xia2 {

    public static void main(String[] args) {
        int rows=0;
        System.out.print("请输入直角三角型的行数:");
        Scanner input=new Scanner(System.in);
        rows=input.nextInt();
        for (int i = 1; i <=rows; i++) {
            for (int j = 1; j <=2*i-1; j++) {
                System.out.print("*");
            }
            System.out.println("\n");
        }
    }
}

for(.....){

for(.....){
......
  continue;
    .......
   }
 .......
}

for(.....){

for(.....){
   ......
    break;
      ......
      }
      ......
}

    

import java.util.Scanner;


public class xia8 {
    public static void main(String[] args) {
        int count=0;            //计数器,记录一共买了几件衣服
        String choice;
        Scanner input=new Scanner(System.in);
        for (int i = 0; i < 5; i++) {
            System.out.println("欢迎光临第"+(i+1)+"家专卖店");
            for (int j = 0; j <3; j++) {
                System.out.println("要离开吗(y/n)");
                choice=input.nextLine();
                if ("y".equals(choice)) {
                    break;
                }
                System.out.println("买了一件衣服");
                count++;
            }
            System.out.println("离店结账");
        }
        System.out.println("总共买了"+count+"件衣服");
        choice=input.nextLine();
    }
}