About for with end issue

[ChristmasZCY]

when I run a code with

 for i=1:10
i
 end

it tells me that

>>> for i=1:12 

错误: 至少缺少一个 END。此处开始的语句没有匹配的 END。

>>>      i

ans =

                          0 +                     1i

>>> end

错误: 非法使用保留关键字 "end"。

What's wrong with it #