The second form is preferable because it tests explicitly for the range of values you consider to be valid.

第二种形式比较好，因为它显式地检测了您认为有效的值的范围。

youdao

The second form is preferable because it tests explicitly for the range of values you consider to be valid.

第二种形式比较好，因为它显式地检测了您认为有效的值的范围。

youdao