是的，有。&。

如果命令1没有失败，&&将在命令1完成时执行命令2。

无论如何都会执行。

不，cd / && tree && echo %time%。回显的时间是第一个命令执行时的时间。

管道有一些问题，但这并不重要，只要人们知道它是如何工作的。

文档中的一段话:

来源:微软，Windows XP专业产品文档，命令shell概述 另外:Windows CMD命令的A-Z索引

Using multiple commands and conditional processing symbols You can run multiple commands from a single command line or script using conditional processing symbols. When you run multiple commands with conditional processing symbols, the commands to the right of the conditional processing symbol act based upon the results of the command to the left of the conditional processing symbol. For example, you might want to run a command only if the previous command fails. Or, you might want to run a command only if the previous command is successful. You can use the special characters listed in the following table to pass multiple commands. & [...] command1 & command2 Use to separate multiple commands on one command line. Cmd.exe runs the first command, and then the second command. && [...] command1 && command2 Use to run the command following && only if the command preceding the symbol is successful. Cmd.exe runs the first command, and then runs the second command only if the first command completed successfully. || [...] command1 || command2 Use to run the command following || only if the command preceding || fails. Cmd.exe runs the first command, and then runs the second command only if the first command did not complete successfully (receives an error code greater than zero). ( ) [...] (command1 & command2) Use to group or nest multiple commands. ; or , command1 parameter1;parameter2 Use to separate command parameters.

在windows中，我使用了上述所有解决方案&，&&，但都不起作用 ';'符号终于为我工作了

npm install; npm start

很简单:用&&符号区分它们。 例子:

echo "Hello World" && echo "GoodBye World".

“再见世界”将印在“你好世界”之后。

当您尝试在一行中使用或操作变量时，请注意它们的内容!例如，如下所示的变量

PATH=C:\程序文件(x86)\某处;“C: \企业\酷工具”;% USERPROFILE % \ AppData \当地\ \ WindowsApps微软;

可能会导致很多无法处理的麻烦，如果你使用它作为%PATH%

右括号终止组语句 双引号不允许使用%PATH%来处理圆括号问题 像%USERPROFILE%这样的引用变量将包含什么?