Bat script learning (I)

Reprint ：BAT Batch file set Detailed command _ Wang Yu Wan Feng's blog -CSDN Blog _ The batch set command  

Reprint ：BAT Script learning —— Basic grammar _Word Brother's blog -CSDN Blog _bat Basic script syntax

First, you can follow the VScode Script writing , Again according to code runner Conduct script testing .vscode Really invincible .

Catalog

One ： Print information ：echo

Two ： A blank line ：echo. ( Comma realizes an empty line )

3、 ... and ： Annotation mode

Four ： Implementation of judgment statement

5、 ... and ： Building links

6、 ... and ： Start the program

7、 ... and ： Implementation calls other bat file

8、 ... and ：%cd% and %~dp0 The role of

One ： Print information ：echo

Two ： A blank line ：echo. ( Comma realizes an empty line )

3、 ... and ： Annotation mode

:: notes             （ No display ）

rem notes         （ Show ）

@ notes            （ The terminal does not display , But it can do @ What's in it , You can hide messages ）

Four ： Implementation of judgment statement

among A Represents a space . Space should be added .

Determine whether a variable is defined

Determine whether a file exists

5、 ... and ： Building links

1. Copy file   ：/h

 2. Create folder shortcuts ： /j

6、 ... and ： Start the program

The format is ：  start + Space + quotes + Space + Program directory

7、 ... and ： Implementation calls other bat file

call: Call another batch file （ If not call And directly call other batch files , After executing the batch file, you will not be able to return to the current file and execute the subsequent commands of the current file ）.

1. First create a shortcut for other folders

2. call call Command to execute other bat file

3. Create new shortcuts for other folders

8、 ... and ：%cd% and %~dp0 The role of

%cd% ： Get the working path of the current file

%~dp0 : Gets the of the current file Can only be used in batch files , It is determined by the directory location of the batch file it is in , It's batch processing , The drive letter where the file is located :+ route

Nine ： Realization if The function of judgment and