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Bracket matching, also known as brace matching or parentheses matching, is a syntax highlighting feature of certain text editors and integrated development environments that highlights matching sets of brackets (square brackets, curly brackets, or parentheses) in languages such as Java, JavaScript, and C++ that use them. The purpose is to help ...
Off-side rule languages: Boo, Cobra, CoffeeScript, F#, Haskell (in do-notation when braces are omitted), LiveScript, occam, Python, Nemerle (Optional; the user may use white-space sensitive syntax instead of the curly-brace syntax if they so desire), Nim, Scala (Optional, as in Nemerle)
A curly bracket or curly brace language has syntax that defines a block as the statements between curly brackets, a.k.a. braces, {}. This syntax originated with BCPL (1966), and was popularized by C. Many curly bracket languages descend from or are strongly influenced by C. Examples:
In computer programming, indentation style is a convention, a.k.a. style, governing the indentation of blocks of source code.An indentation style generally involves consistent width of whitespace (indentation size) before each line of a block, so that the lines of code appear to be related, and dictates whether to use space or tab characters for the indentation whitespace.
More generally, curly braces are used to group words together into a single argument. [ 10 ] [ 11 ] In Tcl, the word while takes two arguments, a condition and an action . In the example above, while is missing its second argument, its action (because the Tcl also uses the newline character to delimit the end of a command).
Blocks use different syntax in different languages. Two broad families are: the ALGOL family in which blocks are delimited by the keywords "begin" and "end" or equivalent. In C, blocks are delimited by curly braces - "{" and "}". ALGOL 68 uses parentheses. Parentheses - "(" and ")", are used in the MS-DOS batch language; indentation, as in Python
An example of curly brackets used to group sentences together. Curly brackets are used by text editors to mark editorial insertions [54] or interpolations. [55] Braces used to be used to connect multiple lines of poetry, such as triplets in a poem of rhyming couplets, [56] although this usage had gone out of fashion by the 19th century. [57] [58]
It has a two-dimension syntax where indenting is meaningful to define blocks (although, an alternate syntax uses curly braces and semicolons). Haskell is a declarative language, there are statements, but declarations within a Haskell script. Example: