If you have ever been faced with the dilemma of deciding whether to place a comma before the word and this might interest you.
According to the Chicago Manual of Style:
When and joins the last two elements in a series of three or more, a comma — known as the serial or series comma — should appear before the conjunction. If the last element consists of a pair joined by and, the pair should still be preceded by a serial comma and the first and.
- She took a photograph of her parents, the president, and the vice president.
- John was singing, Jean was playing guitar, and Alan was running errands and furnishing food.
When independent clauses are joined by and, but, or, so, yet, or any other conjunction, a comma usually precedes the conjunction. If the clauses are very short and closely connected, the comma may be omitted unless the clauses are part of a series.
- [Carol started writing 15 years ago], and [Today she is a bestselling author].
- Raise your right hand and repeat after me.
(An independent clause is a group of words that has a subject and a verb and can stand alone as a sentence. Examples set out above in squared brackets.)
- In a series whose elements are all joined by conjunctions, no commas are needed unless the elements are long and delimiters would be helpful.
- When an ampersand is used instead of the word and the serial comma is omitted.
Just in case you wondered.