Called a full stop in British English and a period in American English, periods are among the easiest punctuations to use. While interrogative sentences end with a question mark, periods are used to end declarative sentences or statements.

Example: I would love to go on a hike.

Don’t forget to bring back my book tomorrow.

Periods and Quotation Marks

Confusion usually arises when a period needs to be placed next to another punctuation. In American English, at the end of a sentence, the period is placed inside the closing quotation mark.

Example: My mom always said, “Never give up on your dreams.”

Periods and Parentheses

The period should be placed inside the closing parenthesis if the sentence inside the parenthesis is complete and independent. However, the period should be placed outside the parentheses if the parenthetical sentence is part of the entire sentence.

Example: The drama club has been canceled by the college. (It’s a pity as I was just starting to like it.)

The college has decided to cancel the drama club (my favorite).

Periods and Ellipses

Having two main uses, an ellipsis (plural: ellipses) are written as three dots in a row. The first use is to denote omission from parts of a quote to ensure clarity. The second use is for literary effects that denote dramatic pauses and sentences that trail off. Also called suspension points, while ellipses shouldn’t be used in formal or academic writing, it can be used in informal or creative writing.

Example: It’s fine if… you want to leave the house.

My dad always says “you shouldn’t treat people badly… treat them the way you want to be treated.”

Quick tips and common mistakes

Keep punctuation consistent and follow a single style guide for documents. Small choices-like where a period sits relative to quotes or whether you use one or two spaces-affect readability and professionalism.

• Use one space after a period in most modern style guides; two spaces are generally outdated.
• If a sentence ends with an abbreviation (e.g., “Dr.” or “etc.”), the abbreviation’s period serves as the sentence-final period-do not add a second one.
• When an ellipsis ends a sentence after an omission, many styles use four dots: three for the ellipsis plus the final period.

For names or initials (e.g., “J. K. Rowling”), follow the convention of the target style: some guides prefer periods, others do not. Above all, be consistent within a document.

FAQ

Should a period go inside single or double quotation marks?

American English generally places periods inside closing quotation marks; British English often places them outside unless they belong to the quoted material. Follow the regional or house style you’re using.

Do sentence fragments need a period?

In formal writing, fragments are usually avoided. If a fragment is used stylistically (in dialogue or creative writing), a period can close it for emphasis, but use this sparingly.

How do I punctuate parentheses at the end of a sentence?

If the parenthetical is a complete sentence on its own, put the period inside the parentheses. If it’s part of a larger sentence, place the period after the closing parenthesis.

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