As an exercise, write a function that takes a string as an argument and displays the letters backward, one per line.

下面就练习一下了，写一个函数，接收一个字符串做参数，然后倒序显示每一个字符，每行显示一个。

youdao

As an exercise, write a function that takes a string as an argument and displays the letters backward, one per line.

下面就练习一下了，写一个函数，接收一个字符串做参数，然后倒序显示每一个字符，每行显示一个。

youdao