Google is your friend. Really. I mean it.
Everytime you see a statement/function/format/whatever you're not familiar with, enter "SAS whatever_you_want_to_know_about" into big G, and you'll get the respective documentation, most often as the first hit.
It's what I do when I stumble across something I haven't seen yet, or haven't used for a long time, or am not very familiar yet.
All the "old hands" around here do it.
If you then have a more specific question, come here. But this community is intended as a help for advanced problems, not as the place for initial learning. This is done in the courses you have already been pointed to.
We're the track&field coaches and dance instructors, but we expect you already have learned how to walk.
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