Colon (punctuation) Colon (punctuation) The colon ( : ) is a punctuation mark consisting of two equally sized dots centered on the same vertical line. A colon precedes an explanation or an enumeration, or list. A colon is also used with ratios, titles and subtitles of books, city and publisher in bibliographies, Biblical citations between chapter and verse, and for salutations business letters and other formal letter writing, and often to separate hours and minutes. The most common use of the colon is to inform the reader that what follows the colon proves, explains, defines, describes, or lists elements of what preceded
Quotation mark punctuation should be written inside or outside the quotation marks; North American printing usually puts ending punctuation to the left of the closing quotation mark, whether it is part of the original quoted material or not, while styles elsewhere vary widely and have different rationales for placing it inside or outside, often a matter of house style. Regarding the aspect, there are two types of quotation marks: The closing single quotation mark is identical or similar in form (depending on the font) to the apostrophe and similar to the prime symbol. The double quotation mark is identical to the ditto