How to use batch processing for loop commands?

The For loop command in batch processing can be used to iterate through a list (such as a file list or command output) and perform a corresponding operation on each element. Here is the basic syntax for using the For loop command:

for %%variable in (列表) do (
    操作1
    操作2
    ...
)

Among them, %%variable is the variable name used to represent the current element in the list, and can be named as needed. The list is a collection of elements that need to be traversed, which can be a manually specified text list or command output. Operations 1, operation 2, etc. are specific actions performed on each element.

Here are some examples of using the For loop command:

1. Iterate through a manually specified list of texts.

for %%x in (item1 item2 item3) do (
    echo %%x
)

1. Traverse the list of files in a directory.

for %%x in (path\to\directory\*) do (
    echo %%x
)

1. Output the commands as a list.

for /f %%x in ('dir /b') do (
    echo %%x
)

In the example above, the echo command is used to print each element to the console. In actual applications, it can be replaced with other operations as needed, such as copying files or calling other commands.

It is important to note that when using the For loop command in batch processing, two percentage signs (%%) are used to represent variables instead of a single percentage sign. This is because the percentage sign has a special meaning in batch processing, so it needs to be escaped.