在C＃是为（;;）安全？它真的？ [英] In C# is a for(;;) safe and what does it really do?

问题描述

我发现了一个空的for语句在code现有的一点，我不知道它做什么，是它的安全。它只是感觉错了。

I found an empty for statement in an existing bit of code and I'm wondering what it does and is it "safe". It just feels wrong.

for(;;)
{
   //some if statements and a case statement
}

谢谢！

推荐答案

这是创造一个无限循环的一种方式。这是一个普通的为循环，但空的初始化，条件和增量EX pressions。由于条件EX pression是一个空操作，该循环永远不会退出。这是完全安全的假设它有一个终止条件（A 破发或返回语句[甚至 GOTO ，我想]）的地方。

This is one way of creating an infinite loop. It's a regular for loop, but with empty initialization, condition, and increment expressions. Because the condition expression is a no-op, the loop never exits. It's perfectly "safe" assuming it has a terminating condition (a break or return statement [or even a goto, I suppose]) somewhere.

我个人preFER写与无限循环，而 S：

Personally, I prefer to write infinite loops with whiles:

while (true) 
{  
    //some statements and a case statement
}

（因为为是迭代和，而是重复的）。

不过，看完<后href="http://stackoverflow.com/questions/2611246/is-for-faster-than-while-true-if-not-why-do-people-use-it/2611529">this问题（由@jailf链接），我现在preFER ，而（42）{...} 。

However, after reading this question (linked by @jailf), I now prefer while (42) { ... }.

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