17.for循环语句（二）
for /?
for /L 

@echo off
for /l %%i in (1,2,10) do echo %%i
pause >nul

(1,3,10)
(10,-2,1)  (1,1,5)

@echo off
for /l %%i in (1,1,5) do md d:\00d\%%i
pause >nul

@echo off
for /l %%i in (1,1,5) do md d:\00d\test%%i
pause >nul
新建的五个文件夹可以指定路径指定名称


@echo off
for /l %%i in (1,1,5) do start www.baidu.com
pause >nul
打开百度五次动作