With a parameter prefix, you can expose the parameter with a meaningful name.

有了参数前置字元，就可以用有意义的名称来公开参数。

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If a parameter has the var keyword, a public writer method is also generated with the parameter’s name as a prefix, followed by _=.

如果参数有一个var关键字，一个公有的写方法会被自动生成，并且名字为参数名加下划线等号（_=）。

youdao

If a parameter has the var keyword, a public writer method is also generated with the parameter’s name as a prefix, followed by _=.

如果参数有一个var关键字，一个公有的写方法会被自动生成，并且名字为参数名加下划线等号（_=）。

youdao