Do While循环语法 [英] Do While loop syntax

问题描述

快速提问，在

结束时强制分号是什么意思？见下面的例子：


x = 0;

do

{

x = x + 1;

} while（x <3）;


在（x <3）之后有分号是什么意思？为什么

编译器不能确定'是while语句的结尾而不需要分号的
？


谢谢。

Quick question, what is the point for forcing the semicolon at the end of
the while statement? See example below:

x = 0;
do
{
x = x + 1;
}while (x < 3);

What''s the point of having the semicolon after the (x < 3)? Why can''t the
compiler figure out that''s the end of the while statement without the need
for the semicolon?

Thank you.

推荐答案

Rene，


主要是因为声明可以像这样使用：


while（x <3）

{


}


因为语句或语句块不是

do / while语句的最后一部分，所以你需要使用分号。

-

- Nicholas Paldino [.NET / C＃MVP]

- mv *@spam.guard.caspershouse.com


" Rene" < [e-mail] in message

news：％2 **************** @ TK2MSFTNGP05.phx.gbl ...

Rene,

Mostly because the while statement can be used like so:

while (x < 3)
{

}

Because the statement or statement block is not the last part of the
do/while statement, you need the semi-colon.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Rene" <[e-mail] in message
news:%2****************@TK2MSFTNGP05.phx.gbl...

快速提问，在

结束时强制分号是什么意思？见下面的例子：


x = 0;

do

{

x = x + 1;

} while（x <3）;


在（x <3）之后有分号是什么意思？为什么

编译器不能确定'是while语句的结尾而不需要分号的
？


谢谢。

Quick question, what is the point for forcing the semicolon at the end of
the while statement? See example below:

x = 0;
do
{
x = x + 1;
}while (x < 3);

What''s the point of having the semicolon after the (x < 3)? Why can''t the
compiler figure out that''s the end of the while statement without the need
for the semicolon?

Thank you.

谢谢Nicholas，


所以你是说那个是不是真的有必要，但语言规则

要求你应该这样，所以你必须这样做？或类似的东西？


Nicholas Paldino [.NET / C＃MVP]" < mv*@spam.guard.caspershouse.com写在

消息新闻：％2 **************** @ TK2MSFTNGP06.phx.gbl .. 。

Thanks Nicholas,

So are you saying that is not really necessary but the language rules
dictate that you should so therefore you have to? or something like that?

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote in
message news:%2****************@TK2MSFTNGP06.phx.gbl...

Rene，


主要是因为while语句可以像这样使用：


while（x <3）

{


}


因为声明或声明block不是

do / while语句的最后一部分，你需要使用分号。


-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


" Rene" < [e-mail] in message

news：％2 **************** @ TK2MSFTNGP05.phx.gbl ...

Rene,

Mostly because the while statement can be used like so:

while (x < 3)
{

}

Because the statement or statement block is not the last part of the
do/while statement, you need the semi-colon.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Rene" <[e-mail] in message
news:%2****************@TK2MSFTNGP05.phx.gbl...

>快速问题，在
while语句结束时强制分号有什么意义？见下面的例子：

x = 0;
执行
{
x = x + 1;
} while（x <3）;

在（x <3）之后有分号是什么意思？为什么
编译器不能确定'没有分号需要的while语句结束？

谢谢。

>Quick question, what is the point for forcing the semicolon at the end of
the while statement? See example below:

x = 0;
do
{
x = x + 1;
}while (x < 3);

What''s the point of having the semicolon after the (x < 3)? Why can''t the
compiler figure out that''s the end of the while statement without the
need for the semicolon?

Thank you.

Rene，


嗯，我觉得这是必要的，因为如果你没有终止，你这么做是b $ b做了这样的事情：


x = 0;

做

{

x = x + 1;

}而（x <3）


//模糊代码块

{

Console.ReadLine（）;

}


编译器假设的是什么做？它是否将模糊的

代码块与上面的while语句相关联？


这就是需要分号的原因。
-

- Nicholas Paldino [.NET / C＃MVP]

- mv*@spam.guard.caspershouse.com


Rene < [e-mail] in message

news：eI ************** @ TK2MSFTNGP03.phx.gbl ...

Rene,

Well, I feel it is necessary because if you didn''t terminate, and you
did something like this:

x = 0;
do
{
x = x + 1;
} while (x < 3)

// Ambiguous code block
{
Console.ReadLine();
}

What is the compiler suppose to do? Does it associate the ambiguous
code block with the while statement above it?

That''s why the semi-colon is needed.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Rene" <[e-mail] in message
news:eI**************@TK2MSFTNGP03.phx.gbl...

谢谢Nicholas，


所以你说这不是真的有必要但是语言规则

要求你应该如此所以你必须？或类似的东西？


Nicholas Paldino [.NET / C＃MVP]" < mv*@spam.guard.caspershouse.comwrote
消息新闻中的
：％2 **************** @ TK2MSFTNGP06.phx.gbl .. 。

Thanks Nicholas,

So are you saying that is not really necessary but the language rules
dictate that you should so therefore you have to? or something like that?

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote
in message news:%2****************@TK2MSFTNGP06.phx.gbl...

> Rene，

主要是因为while语句可以这样使用：

while（ x< 3）



因为语句或语句块不是
do / while语句的最后一部分，所以需要分号。

-
- Nicholas Paldino [.NET / C＃MVP]
- mv*@spam.guard.caspershouse.com

Rene < [e-mail] in message
新闻：％2 **************** @ TK2MSFTNGP05.phx.gbl ...

>Rene,

Mostly because the while statement can be used like so:

while (x < 3)
{

}

Because the statement or statement block is not the last part of the
do/while statement, you need the semi-colon.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"Rene" <[e-mail] in message
news:%2****************@TK2MSFTNGP05.phx.gbl...

>>快速问题，在while语句的末尾强制分号有什么意义？见下面的例子：

x = 0;
执行
{
x = x + 1;
} while（x <3）;

在（x <3）之后有分号是什么意思？为什么不能编译器弄清楚'没有
需要分号的'while语句的结束？

谢谢。

>>Quick question, what is the point for forcing the semicolon at the end
of the while statement? See example below:

x = 0;
do
{
x = x + 1;
}while (x < 3);

What''s the point of having the semicolon after the (x < 3)? Why can''t
the compiler figure out that''s the end of the while statement without
the need for the semicolon?

Thank you.

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