// output

 * 
 *  * 
 *  *  * 
 *  *  *  * 
 *  *  *  *  * 
   
                 for (int i = 1; i <= 5; i++) 
                {
                 for(int j= 1; j<=i; j++)
                {
                   System.out.print(" * ");
                }
                   System.out.println();
                }
                
 *  *  *  *  * 
 *  *  *  * 
 *  *  * 
 *  * 
 *             for (int i = 5; i >=1; i--) 
              {
               for(int j= 1; j<=i; j++)
              {
                System.out.print(" * ");
              }
                System.out.println();
              }