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  2. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  3. reStructuredText - Wikipedia

    en.wikipedia.org/wiki/ReStructuredText

    reStructuredText (RST, ReST, or reST) is a file format for textual data used primarily in the Python programming language community for technical documentation.. It is part of the Docutils project of the Python Doc-SIG (Documentation Special Interest Group), aimed at creating a set of tools for Python similar to Javadoc for Java or Plain Old Documentation (POD) for Perl.

  4. GNU Readline - Wikipedia

    en.wikipedia.org/wiki/GNU_Readline

    GNU Readline is a software library that provides in-line editing and history capabilities for interactive programs with a command-line interface, such as Bash.It is currently maintained by Chet Ramey as part of the GNU Project.

  5. Free-form language - Wikipedia

    en.wikipedia.org/wiki/Free-form_language

    Most free-form languages descend from ALGOL, including C, Pascal, and Perl. Lisp languages are free-form, although they do not descend from ALGOL. Rexx and its dialects ooRexx and NetRexx are mostly free-form, though in some cases whitespace characters are concatenation operators. SQL, though not a full programming language, is also free-form.

  6. Box-drawing characters - Wikipedia

    en.wikipedia.org/wiki/Box-drawing_characters

    Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. These characters are characterized by being designed to be connected horizontally and/or vertically with adjacent characters, which requires proper alignment.

  7. Markdown - Wikipedia

    en.wikipedia.org/wiki/Markdown

    In 2002 Aaron Swartz created atx and referred to it as "the true structured text format". Gruber created the Markdown language in 2004 with Swartz as his "sounding board". [13] The goal of the language was to enable people "to write using an easy-to-read and easy-to-write plain text format, optionally convert it to structurally valid XHTML (or ...

  8. Indentation style - Wikipedia

    en.wikipedia.org/wiki/Indentation_style

    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.

  9. Programming language - Wikipedia

    en.wikipedia.org/wiki/Programming_language

    This is an accepted version of this page This is the latest accepted revision, reviewed on 24 January 2025. Language for communicating instructions to a machine The source code for a computer program in C. The gray lines are comments that explain the program to humans. When compiled and run, it will give the output "Hello, world!". A programming language is a system of notation for writing ...