Run.bat

@ECHO OFF & setLocal EnableDelayedExpansion
:Start

REM Means comment, doesn't run anything

SET /P dirName=Please enter a directory: 
IF "%dirName%"=="" GOTO :Start REM If the directory name is empty, go back to start.

:Confirmation
SET /P confirmation=Are you sure you want to change file names in %dirName%? (y/n): 

REM Confirm if user typed correct directory name
REM Check if it exists
IF /I "%confirmation%" EQU "Y" goto :FileCheck
IF /I "%confirmation%" EQU "N" goto :Start

:FileCheck
IF exist %dirName% (
	cd %dirName% 
	REM If it exists, change directory
	goto :FileRename
	)ELSE(
		ECHO "File not found." ;Else file not found
)


REM Iterator, we count from 0.
:FileRename
set a=0

;How to set multiple file types
FOR /F "delims=" %%i in ('dir /B *.png *.jpg') do ( 
	ren "%%i" "!a!.jpg" ;Rename it
	set /a a+=1 ;Iterator +1
)

IF "%a%" >= 1 do(
ECHO "Changed %a% files" ;Display how many files were changed. ;Output for debugging
)ELSE(
	ECHO "No files found."
)
REM Wait for user to hit key to end program.
PAUSE