We apologize if you clicked on this page looking for DIY advice, as the brackets we’re interested in are no use for putting up shelves. Instead, we’re looking at how brackets are used in writing.
The most common brackets are round brackets or parentheses. These can be used for a variety of reasons, including the following:
We’ve included colors above so that you can see how each of these work in the passage below:
I saw something strange while walking home the other day (a sunny Thursday). It was a pair of brackets, just hanging there in mid-air. I circled them for some time, trying to work out whether I should tell someone (I was worried nobody would believe me). Eventually, I called Dr. Jenny Braces at New York University (NYU). She told me that the brackets would “dematerialize comprehensively after an indeterminate duration if left undisturbed” (i.e., they would go away by themselves in the end).
In addition to the above, parentheses also have special uses in some subjects, such as mathematics. And in academic writing, they are used for citations in author–date referencing systems.
Square brackets are most often used to indicate a change to what an author wrote, such as when editing a quote or adding an editorial note. For example, we might use them to add a translation:
Chaucer speaks of April and its “shoures soote [sweet showers].”
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Here, we have added a translation of the Middle English for clarity. Using square brackets shows the reader that this is an addition, not part of the original text by Chaucer.
Other uses include to add “[sic]” after an error in a quote or to enclose ellipses (i.e., […] ). However, the rules about these can vary, so check your style guide (if available) before doing either.
Finally, a quick word on curly brackets and angle brackets. Both of these are rare in most types of writing, but they are very useful in certain subject areas:
Some other symbols are also described as “brackets” (mostly from other languages). But these are even rarer than curly and angle brackets, so most people will not need to know about them.
There are two main types of bracket that you may need to use in your writing:
In some subject areas, such as computing and math, you may also see {curly brackets} and ⟨angled brackets⟩, which have technical uses. But these are very rare in most types of writing. Hopefully, this answers your bracket-based questions! But let us know if you’d like more help.
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