del /f /a /q "File"
@echo offsetlocal enabledelayedexpansioncd /d "D:\BuckUp\EBOOKS":mainclsecho:1. Facuecho:2. Algoritmiaecho:3. Assemblyecho:4. C++echo:5. Pythonecho:set "number="set /p "number=Number: "if not defined number goto :mainif "!number!" equ "1" explorer "Facu"if "!number!" equ "2" explorer "Algoritmia"if "!number!" equ "3" explorer "Assembly"if "!number!" equ "4" explorer "C++"if "!number!" equ "5" explorer "Python"goto :main
setlocal enabledelayedexpansion:mainset "string="set /p "string=string: "if not defined string goto :mainfor %%a in (A B C D E F G H I J K L MN O P Q R S T U V W X Y Z) do set "string=!string:%%a=%%a!"echo:output: !string! & goto :main
setlocal enabledelayedexpansionset "count=0"set "string=Hello World":loopif "!string:~%count%,1!" neq "" set /a "count+=1" & goto loopecho:La cadena "%string%" contiene %count% caracteres.
set "a=hola"echo %a:~-2%