blocks|key|1967394|text|使用(ECHO+2)>>file.txt。这将输出不带任何空格的2。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1967395|entityMap^0|2|I|W|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Use <code>(ECHO 2)&gt;&gt;file.txt</code>. This will output <code>2</code> without any spaces.

blocks|key|1967487|text|鲜为人知的特性:重定向操作符可以到达行上的任何位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1967488|>>file.txt+echo+2|code-block|syntax|javascript|1967489|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Little-known feature: The redirection operator can go anywhere on the line.

<pre><code>&gt;&gt;file.txt echo 2
</code></pre>

blocks|key|1967430|text|echo+%5E2>>file.txt似乎很适合我。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1967431|entityMap^0|0|H|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

<code>echo ^2&gt;&gt;file.txt</code> appears to work for me.

blocks|key|1754087|text|使用%5E转义：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1754088|Echo+%5E2>>+file.txt|code-block|syntax|javascript|1754089|entityMap^0|2|1|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Use the <code>^</code> escape :

<pre><code>Echo ^2&gt;&gt; file.txt
</code></pre>

blocks|key|1754097|text|echo.2>>text.txt|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1754098|是的，这很奇怪。|unstyled|1754099|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>echo.2&gt;&gt;text.txt
</code></pre>

Yes, it's weird.

blocks|key|1967500|text|另一种方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1967501|echo>>file.txt+2|code-block|syntax|javascript|1967502|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

another method

<pre><code>echo&gt;&gt;file.txt 2
</code></pre>

blocks|key|1754176|text|或者，您可以使用延迟扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1754177|setlocal+EnableDelayedExpansion
set+"var=2"
echo(!var!>>+file.txt|code-block|syntax|javascript|1754178|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Or you can use the delayed expansion

<pre><code>setlocal EnableDelayedExpansion
set "var=2"
echo(!var!&gt;&gt; file.txt
</code></pre>

blocks|key|1754247|text|如果您需要准确的写入，请使用以下命令|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1754248|(ECHO+%7Cset+/p=2)>>file.txt|code-block|syntax|javascript|1754249|DMan的命令将在"2“后面生成一个0x0D0A换行符。|1754250|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you need an accurate write, use this command

<pre><code>(ECHO |set /p=2)&gt;&gt;file.txt
</code></pre>

the command by DMan will produce a 0x0D0A line break behind the "2"

blocks|key|1754286|text|要将数字写入没有尾随换行符的文件中，您可以使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1754287|cmd+/C+set+/A+"2">file.txt|code-block|syntax|javascript|1754288|这是可行的，因为当在命令提示符上下文中执行时(因此当直接在cmd.exe中运行时)，set+/A将返回(最后)结果(没有换行)。|offset|length|style|CODE|1754289|如果您使用的是命令提示符，则可以简单地使用以下命令：|1754290|set+/A+"2">file.txt|1754291|尽管您不能在批处理文件中使用它，但您需要额外的cmd+/C来强制正确的执行上下文。|1754292|不用说，这当然只能输出数字，或者准确地说，带符号的32位整数。|1754293|entityMap^0|0|0|T|7|16|6|0|0|0|N|6|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@$I|Z|J|10|K|L]|$I|11|J|12|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|15|8|@$I|16|J|17|K|L]]|9|@]|A|$]]|$1|S|3|T|5|6|7|18|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|V|$]]

To write a number to a file without a trailing line-break you could use the following:

<pre class="lang-cmd prettyprint-override"><code>cmd /C set /A "2"&gt;file.txt
</code></pre>

This works, because <code>set /A</code> returns the (last) result (without line-break) when executed in command prompt context (hence when directly run in <code>cmd.exe</code>).

If you are working in command prompt anyway, you could simply use this:

<pre class="lang-cmd prettyprint-override"><code>set /A "2"&gt;file.txt
</code></pre>

Though you cannot use that in a batch file, you need the extra <code>cmd /C</code> to force the right execution context.

Needless to say, this can of course only output numbers, or precisely said, signed 32-bit integers.

blocks|key|1967580|text|根据this的回答，如果有人想知道如何做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1967581|echo+"command1+&&+command2"+>+file.txt|code-block|syntax|javascript|1967582|在file.txt中没有qoutes的情况下，你可以这样做：|style|CODE|1967583|echo+command1+%5E&%5E&+command2+>+file.txt|1967584|已在Windows+Server+2003上测试。|1967585|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/7225667/1637178^0|2|4|0|0|0|1|8|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|13|8|@$A|14|B|15|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|O|3|P|5|6|7|17|8|@]|9|@]|C|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

Based on <a href="https://stackoverflow.com/a/7225667/1637178">this</a> answer, if anyone is wondering how to do this:

<pre><code>echo "command1 &amp;&amp; command2" &gt; file.txt
</code></pre>

with no qoutes in <code>file.txt</code> then you do it like this:

<pre><code>echo command1 ^&amp;^&amp; command2 &gt; file.txt
</code></pre>

Tested on Windows Server 2003.

blocks|key|1967599|text|避开字符'2‘|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1967600|在linux中：echo+\2>file.txt|offset|length|style|CODE|1967601|在windows中：echo+%5E2>file.txt|1967602|在windows中，这也是可行的。|1967603|echo.2>file.txt回显和点之间没有空格|1967604|entityMap^0|0|8|G|0|A|G|0|0|0|F|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|O|$]]

escape the haracter '2'

in linux:
<code>echo \2&gt;file.txt</code>

in windows:
<code>echo ^2&gt;file.txt</code>

in windows this also will work 

<code>echo.2&gt;file.txt</code> no space between echo and the dot

How do I echo the number 2 into a file, from a batch script?

This doesn't work:

<pre><code>Echo 2&gt;&gt; file.txt
</code></pre>

because <code>2&gt;&gt;</code> is a special command. :(

How to echo "2" (no quotes) to a file, from a batch script?

Windows Server

Windows

如何将数字2从批处理脚本回显到文件中？这不起作用：Echo 2>> file.txt因为2>>是一个特殊的命令。:(

问如何从批处理脚本回显"2“(无引号)到文件？
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问如何从批处理脚本回显"2“(无引号)到文件？EN

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问如何从批处理脚本回显"2“(无引号)到文件？
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