The comma , is a punctuation mark that appears in several variants in different languages. Some typefaces render it as a small line, slightly curved or straight, but inclined from the vertical; others give it the appearance of a miniature filled-in figure 9 placed on the baseline., It is grammatically correct to use a comma before "and" (and other coordinating conjunctions such as "but", "or", "nor") only when it splits two independent clauses (i.e. if you remove the "and" you will be left with two complete sentences), or if you're using it as an Oxford comma., A comma (pronounced “cah-muh”) is a punctuation mark that provides pauses in reading and speaking by separating parts of a sentence. You’ll find examples of commas in all sorts of sentences below., Learn how and when to use commas (,) with comma rules in English. This punctuation mark is used to separate parts of a sentence, and if the sentence is spoken, the comma generally indicates a short pause., Use a comma + a little conjunction (and, but, for, nor, yet, or, so) to connect two independent clauses, as in "He hit the ball well, but he ran toward third base.", .