An Oxford (or serial) comma is used right before a conjunction in a list.
For example:
Without Oxford Comma:
I would like to thank my parents, my acting coach and God.
With Oxford Comma:
I would like to thank my parents, my acting coach, and God.
The serial comma is also called the Oxford comma because it is commonly used by writers and editors at Oxford University Press. The use of the serial comma helps clarify lists by separating each item with a comma, including before the conjunction.
Oxford Comma - song - was created on 2008-05-26.
It is called an Oxford comma.
It can be either way, although it is more common to leave out the comma. The comma, if used, is called the Oxford comma, the Harvard comma(,) or the serial comma, where the first two refer to prestigious universities and the third refers to the series of items.
If you mean "do we use a comma before 'etc.'?", then yes we do. Remember to take some paper, a pen, etc. (Oxford ALD).
It depends on the style guide you are following. In American English, the use of a comma before "and" in a list of items (Oxford comma) is common. In British English, the Oxford comma is often omitted. It's best to be consistent within a document or organization.
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Example: It was hot, humid, and raining. In the example above, the comma after "humid" is unnecessary but acceptable. The use of the comma before 'and' is called the 'serial comma' or the 'Oxford comma', it's optional. Many people use the serial comma for clarity. The other use of a comma is to break up a long sentence, and signifies a slight pause. Example: He hit the ball, dropped the bat, and ran to first base.
A comma typically goes before "and" when it is connecting two independent clauses. However, a comma is not usually needed before "and" when it is connecting items in a list or when it is connecting two closely related clauses.
Commas should be used after the first term, stopping at the "and" of the last term, if you don't use oxford commas. For example: There was a dog, cat, bird, fish and monkey. If you do use oxford commas, the comma goes before the and, as well: There was a dog, cat, bird, fish, and monkey. You never use the comma before the last term.
Oxford commas or serial commas are placed at the end of a comma separated list just before the last item on that list, accompanied by a conjunction. IE. James, Melissa, Geoff, and I all went to lunch together.
In a series you should put commas after each element, except for the last. For example you should write: John, Margaret, Mary, and Paul came to the party. The comma after Mary is called the Oxford, Serial, or Harvard comma. Most style guides on both sides of the Atlantic recommend always using this comma.