/*
4- Print a diamond 
      *
	 * *
	* * *
   * * * *
    * * *
	 * *
	  *
	  */
int row=7;
for (int i = 1; i <= row; i += 1) {
	  for (int j = 0; j <=row-i; j++)
		System.out.print(" ");

	  for (int j = 0; j < i; j++)
		System.out.print(" *");

	  System.out.print("\n");
	}

 for (int i = row-1; i >= 0; i -= 1) {
	  for (int j = 0; j < row-i+1; j++)
		System.out.print(" ");

	  for (int j = 0; j < i; j++)
		System.out.print(" *");

	  System.out.print("\n");
	}