【Batch】learning notes

Sorry for the wrong picture

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1 What is? bat

bat yes batch Abbreviation , First look at the definition on Baidu Encyclopedia

bat （ Batch file type ） Batch file , stay DOS and Windows（ arbitrarily ） In the system ,.bat Files are executable files , Consisting of a series of orders , It can include calls to other programs . Every line in this file is a DOS command （ Most of the time it's like we're DOS The command line executed at the prompt is the same ）, You can use DOS Under the Edit perhaps Windows notepad (notepad) And any text file editing tool to create and modify batch files .

Here are some basic script operations

2 Basic operation

notes

Comment code , Two colons under English input method

:: Code 

Pause

Pause after running ,pause, Black windows do not automatically exit

 Code 
pause

Set a variable

%echo off
SET var=2021_12_17
echo %var%
pause

When using variables %var% Equivalent to 2021_12_17

For more operations on variables, please refer to .bat The batch （ 3、 ... and ）： Variable declarations 、 Set up 、 Splicing 、 Intercept

Delete the entire folder

Divided into two steps
The first step is to delete the contents of all subfolders

del /q/a/f/s  Folder path \"."

Step 2 delete all empty folders （ The black window will let you decide yes or no）

rd /s  Folder path \

Delete... For example hello Folder

del /q/a/f/s C:\personal\hello\"."
rd /s C:\personal\hello\

Copy / Move

copy src dst
move src dst

Keep going cp and mv I'm not the only one of you

Switch disks

cd no way , need cd /d

cd /d D:\xxx

Don't keep on there cd cd Thought the computer was broken

View the list of files

No ls, use dir

dir