The two joiner methods concatenate a List of strings together.

两个joiner方法把一系列字符串串在一起。

youdao

I don't know how to take two strings and multiply them together.

我不知道，怎么把两个字符串乘到一起。

youdao

I don't know how to take two strings and multiply them together.

我不知道，怎么把两个字符串乘到一起。

youdao