如何停止我的批处理文件打印正在运行的代码？

Question

I have the following script:

FOR %%i IN (1 2 3) DO (     
    IF %%i==1 ( 
       ECHO %%i 
    )
    IF %%i==2 ( 
       ECHO %%i 
    )
    IF %%i==3 ( 
       ECHO %%i 
    )
)

I just wanted to print

1
2
3

because I will be using the same logic again to write a more complete task ... I'm not a Windows guy, and I have no idea how to do it in batch . Instead I'm getting:

c:\>FOR %i IN (1 2 3) DO (
IF %i == 1 (ECHO %i  )
 IF %i == 2 (ECHO %i  )
 IF %i == 3 (ECHO %i  )
)

c:\>(
IF 1 == 1 (ECHO 1  )
 IF 1 == 2 (ECHO 1  )
 IF 1 == 3 (ECHO 1  )
)
1

c:\>(
IF 2 == 1 (ECHO 2  )
 IF 2 == 2 (ECHO 2  )
 IF 2 == 3 (ECHO 2  )
)
2

c:\>(
IF 3 == 1 (ECHO 3  )
 IF 3 == 2 (ECHO 3  )
 IF 3 == 3 (ECHO 3  )
)
3

Answer 1

To avoid echoing the Windows commands in a shell script, use @echo off :

@ECHO OFF
FOR %%i IN (1 2 3) DO (     
    IF %%i==1 ( 
       ECHO %%i 
    )
    IF %%i==2 ( 
       ECHO %%i 
    )
    IF %%i==3 ( 
       ECHO %%i 
    )
)

Note the preceding @ in echo off prevents echo off from echoing. If you don't have the @ then you'll see echo off echoed to the terminal but then echoing will be off after that point. A shell command which is preceded by @ is not echoed. So @ can be used to prevent echoing of individual commands.