16.for循环语句（一）
for /?

FOR %variable IN (set) DO command [command-parameters]


for  %i  in  (1 2 3 4 5) do echo %i

@echo off
for %%i in (1 2 3 4 5) do echo %%i
pause >nul

这里变量%是放在左边的


(a b c)也可以不一定是数字


@echo off
for %%i in (c:\c*) do echo %%i
pause >nul


@echo off
for %%i in (d:\*.txt) do echo %%i
pause >nul



通配符 (f:\*.txt) do echo %%i
显示几个txt结尾的文件