Simple programming commands in a batch environment

"The simplest idea of how to write a batch file is: Figure out how you would type the commands at a DOS prompt, then type them, one per line, in a text file — and you’ve written your batch file.

However, there are also more sophisticated batch file structures, using simple programming commands built into the batch structure. This article summarizes the most important of these."

http://www.aumha.org/a/batches.php