When you've been typing in words to the keyboard like your name or any word that you're trying to provide to the user, a string really looks like this.

当你们通过键盘键入单词，比如你的名字,或者你想提供给用户的任何单词，一个字符串实际上看起来就是这样。

哈佛公开课 - 计算机科学课程节选