Question : bat file that loops and renames

I need a bat file that loops in a director of files,   read the files run 2 comand line process rename the file,  read the next .........
I have written some very simple and basic bat file and dont know how to do a loop.   I have a bat file that will do 1 file but need the code to loop.

thanks

Answer : bat file that loops and renames

Do you correct the slash of the script?