填空题

下列程序的运行结果是()。 
Program test 
    Implicit none 
    Integer,parameter:: limit=10 
    Integer counter 
    Integer:: ans=0 
    Counter=2 
   do while(counter<=limit)
     ans=ans+counter
     counter=counter+2
  end do
Wrte(*,*)ans
end 

【参考答案】

30