human
I've heard there are different types of commas. What are they?
assistant
There are three main types of comma, and each one has a different purpose. The serial comma is used to separate independent clauses in a series. The Oxford comma is used when the last item in a list is a non-restrictive clause that does not provide additional information about the previous items in the list. The em dash is used to indicate a pause or break in thought within a sentence.