in reply to
listing all subdirectories of directory into file
Show us what you have tried, what you expected it to do, and how you think it failed. This will give you (and others attempting to learn from this site) a better experience.
A slightly simpler approach than jdrago999's above is to use these built-in perl functions to achieve your objective:
opendir, readdir, closedir.
You will need to use the "-d" and "-f" operators to distinguish between directory names and file names. See -X for information on this.
I hope life isn't a big joke, because I don't get it.