bat 脚本

@echo off 先关闭其他盘符

算术运算 set /a 1+2
变量：set /a var = 10 * (2 + 9)
echo %var% 

set a=hello

rem 分支语句
if exist c:aa\123.txt (
echo ok
) else (
echo no
)

rem 循环遍历目录
for /d %%a in (*) do echo %%a==test rd %%a  

rem 循环遍历文件
for /r "c:\ww\qq" %%v in (*.py) do del %%v

rem 循环遍历数字
for /L %%v in (1,1,20) do ping %1.%%v

rem 循环遍历文件内容
for /F %%v in (3.bat) do echo %%v

:loop
md VVV
cd VVV
goto loop

rem 标准输入
:first
set /p opt=
if %opt% == 1 goto first

pause>nul
exit


&&(and)  ||(or)