用for语句求和整数。

public class Main 

{

   public static void main(String[] args)/*时 代 J a v a - N o w J a v a . c o m 提供*/

   {

      int total = 0;


      // total even integers from 2 through 20

      for (int number = 2; number <= 20; number += 2)

         total += number;


      System.out.printf("Sum is %d%n", total);

   } 

}