language-agnostic - 一个函数应该只有一个return语句吗？(Should a function have only one return statement?)

Question

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Are there good reasons why it's a better practice to have only one return statement in a function?

(是否有充分的理由说明为什么在函数中仅包含一个return语句是一种更好的做法？)

Or is it okay to return from a function as soon as it is logically correct to do so, meaning there may be many return statements in the function?

(还是在逻辑上正确地从函数中返回就可以，这意味着函数中可能有很多return语句？)

  ask by community wiki translate from so

Answer 1

I often have several statements at the start of a method to return for "easy" situations.

(在方法开始时，我经常会有几条陈述返回“轻松”情况。)

For example, this:

(例如，这：)

public void DoStuff(Foo foo)
{
    if (foo != null)
    {
        ...
    }
}

... can be made more readable (IMHO) like this:

(...可以像这样变得更具可读性（IMHO）：)

public void DoStuff(Foo foo)
{
    if (foo == null) return;

    ...
}

So yes, I think it's fine to have multiple "exit points" from a function/method.

(所以是的，我认为从一个函数/方法中获得多个“退出点”是可以的。)