Java——循环语句

class jc {
public static void main(String[] args){ 
   int a=1,b=0,c=0;
      for(int d=1;d<=10;d++){
          a*=d;
          b+=a;
          c++;
         if(c<10){
    System.out.print(a+"+");
  }
         else{
     System.out.print(a+"="+b); 
  }  
 }
 }
 }

class jj
{
public static void main(String[] args)
{
   for( int a=1;a<10;a++)
               {
                   for(int b=1;b<=a;b++)
                      {
                      System.out.print(b+"*"+a+"="+(a*b)+"  "); 
              }
 System.out.println();
 }
             }
}

倒三角形
```java
class zhi{
 public static void main(String [] args){
 System.out.println("倒三角形");
       for(int a=0;a<=8;a++){
      for(int b=0;b<=8-a;b++){
       System.out.print("*");
   }
     System.out.println( );}
}
}

import java.util.*;
class  nb{
    public static void main(String [] args){
  Scanner n=new Scanner(System.in);
System.out.println("请输入正整数");
   int b=n.nextInt();
   int c=0;
    for(int a=1;a<=b;a++){
     c=a+c;
 }
 System.out.println("1+2+…+"+b+"="+c);
}
}

class sw
 {
public static void main(String []args) throws Exception
 {
     int a=100;
     int b=2;
    System.out.println("请输入运算符");
    int s=System.in.read();
     switch(s)
    {
 case'+':
       System.out.println(a+"+"+b+"="+(a+b));
   break;
 case'*':
    System.out.println(a+"*"+b+"="+(a*b));
     break;
  case'/':
      System.out.println(a+"/"+b+(a/b));
            break;
  case'%':
       System.out.println(a+"%"+b+(a%b));
     break;
             default:
   System.out.println("您输入的符号不正确");
    }
}
}

public static void main(String [] args)
{
  final Long MAX=9999999999L;
 int a=1,b=1,c=1;
 while(c<=MAX)
         {System.out.println("傻了吧"+a+""+b);
          a=a+b;
          b=a+b;
          c=c++;
       }
  }
}