English punctuation
in the English language helps the reader to understand a sentence through visual means other than just the letters of the alphabet. English punctuation has always had two complementary aspects: on the one hand, phonological punctuation linked to how the sentence can be read aloud, particularly to pausing; and on the other hand, grammatical punctuation linked to the structure of the sentence. In popular discussion of language, incorrect punctuation is often seen as an indication of lack of education and of a decline of standards.
Variants
The two broad styles of punctuation in English are often called British and American. These two styles differ mainly in the way in which they handle quotation marks with adjacent punctuation, and the use or omission of the full point with contraction abbreviations.Open and closed punctuation
The terms open and closed punctuation have been applied to minimizing versus comprehensively including punctuation, respectively, aside from any dialectal trends. Closed punctuation is used in scholarly, literary, general business, and "everyday" writing. Open style dominates in text messaging and other short-form online communication, where more formal or "closed" punctuation can be misinterpreted as aloofness or even hostility.;Open punctuation
Open punctuation eliminates the need for a period at the end of a stand-alone statement, in an abbreviation or acronym, as well as in components of postal addresses. This style also eschews optional commas in sentences, including the serial comma. Open punctuation also frequently drops apostrophes.
Open punctuation is used primarily in certain forms of business writing, such as letterhead and envelope addressing, some business letters, and résumés and their cover letters.
;Closed punctuation
In contrast, closed punctuation uses commas and periods in a strict manner.
Closed style is common in presentations, especially in bulleted and numbered lists. It is also frequently used in advertising, marketing materials, news headlines, and signage.
Usage of different punctuation marks or symbols
Frequency
One analysis found the average frequencies for English punctuation marks, based on 723,000 words of assorted texts, to be as follows :| Name | Glyph | Frequency |
| Full stop | . | 65.3 |
| Comma | , | 61.3 |
| Double quotation mark | " | 26.7 |
| Apostrophe / single quotation mark | ' | 24.3 |
| Hyphen | 15.3 | |
| Question mark | ? | 5.6 |
| Colon | : | 3.4 |
| Exclamation mark | ! | 3.3 |
| Semicolon | ; | 3.2 |
Apostrophe
The apostrophe, is used to mark possession as in "John's book", and to mark letters omitted in contractions, such as you're for you are.Brackets
, are used for parenthesis, explanation or comment: such as "John Smith..."Colon
The colon is used to start an enumeration, as in Her apartment needed a few things: a toaster, a new lamp, and a nice rug. It is used between two clauses when the second clause clarifies the first, as in I can barely keep my eyes open: I hardly got a wink of sleep. It is also used between two clauses when the second clause describes the object of the first clause, as in Bob gave me a slice of the worst pizza I ever had: anchovies, pineapple and olives.Comma
The comma is used to disambiguate the meaning of sentences, by providing boundaries between clauses and phrases. For example, "Man, without his cell phone, is nothing" and "Man: without, his cell phone is nothing" have greatly different meanings, as do "eats shoots and leaves" and "eats, shoots and leaves". The comma is also used . For example, “January 7, 1985” and “2,000”.Dash and hyphen
The dash and hyphen or hyphen-minus is used:- as a line continuation when a word is broken across two lines;
- to apply a prefix to a word for which there is no canonical compound word;
- as a replacement for a comma, when the subsequent clause significantly shifts the primary focus of the preceding text.
Ellipsis
Exclamation mark
The exclamation mark is used to mark an exclamation.Full point, full stop, or period
The character known as the full point or full stop in British and Commonwealth English and as the period in North American English serves multiple purposes. As the full stop, it is used to mark the end of a sentence. It is also used, as the full point, to indicate abbreviation, including of names as initials:The frequency and specifics of the latter use vary widely, over time and regionally. For example, these marks are usually left out of acronyms and initialisms today, and in many British publications they are omitted from contractions such as Dr for Doctor, where the abbreviation begins and ends with the same letters as the full word.
Another use of this character, as the decimal point, is found in mathematics and computing, dividing whole numbers from decimal fractions, as in 2,398.45. In many languages, the roles of the comma and decimal point are reversed, with the comma serving as the decimal separator and the dot used as a thousands separator. In computing, the dot is used as a delimiter more broadly, as site and file names, and serves special functions in various programming and scripting languages.
Guillemets
sometimes called French quotation marks, are relatively uncommon in English, but are sometimes used as a form of quotation mark.Question marks
The question mark is used to mark the end of a sentence which is a question.Quotation marks
are used to mark quotation. In all forms of English, question marks and exclamation points are placed either inside or outside the quotation marks depending on whether they apply to the whole sentence or only to the quoted material. In British publications, periods and commas are most often treated the same way, but usage varies widely. In American publications, periods and commas are usually placed inside the quotation marks regardless. The American system, also known as typographer's quotation, is also common in Canada, and in fiction publishing broadly.A third system, known as logical quotation, is strict about not including terminal punctuation within the quotation marks unless it was also found in the quoted material. Some writers conflate logical quotation and the common British style. For example, The Chicago Manual of Style, 14th ed.: "The British style is strongly advocated by some American language experts. Whereas there clearly is some risk with question marks and exclamation points, there seems little likelihood that readers will be misled concerning the period or comma." It goes on to recommend "British" or logical quotation for fields such as linguistics, literary criticism, and technical writing, and also notes its use in philosophy texts.
British and American practices also differ in other ways; for example, North American publishers tend to favour double quotation marks for primary quotation, switching to single for any quote-within-a-quote, while British and Commonwealth publishers may use either single or double for primary quotation.