htaccess question

[FurnaceFace]

I seem to have forgotten how to do this, and figure the collective here will give me an answer faster than google. I have a domain where I wish to redirect
www.domainname.com to
www.domainname.com/

Anyone know offhand the htaccess code I need?

Thanks.

[photon]

Something like this?

http://enarion.net/web/apache/htaccess/trailing-slash/