Scratch (programming language)

Scratch is a high-level block-based visual programming language and website aimed primarily at children as an educational tool, with a target audience of ages 8 to 16. Users on the site can create projects on the website using a block-like interface. Scratch was conceived and designed through collaborative National Science Foundation grants awarded to Mitchel Resnick and Yasmin Kafai. Scratch is developed by the MIT Media Lab. It has been translated into 70+ languages, and is used in most parts of the world. Scratch is taught and used in after-school centers, schools, and colleges, as well as other public knowledge institutions. As of 15 February 2023, community statistics on the language's official website show more than 123 million projects shared by over 103 million users, over 804 million total projects ever created (including unshared projects), and more than 95 million monthly website visits.

Scratch
Logo used since 16 October 2015
Scratch 3.0 editor
ParadigmEvent-driven, block-based programming language
DeveloperMIT Media Lab
First appeared
  • 11 October 2003 (2003-10-11) (first prototype)
  • 15 May 2007 (2007-05-15) (Scratch 1.0)
  • 9 May 2013 (2013-05-09) (Scratch 2.0)
  • 2 January 2019 (2019-01-02) (Scratch 3.0)
Stable release
  • Scratch 3.0 (online editor) / 2 January 2019 (2019-01-02)
  • Scratch 3.29.1 (offline editor) / 27 February 2022 (2022-02-27)
Implementation languageSqueak (Scratch 1.x)
ActionScript (Scratch 2.0)
HTML5, JavaScript (Scratch 3.0)
OSMicrosoft Windows, macOS, Linux (via renderer), HTML5(via web browser), iOS, iPadOS, and Android.
LicenseBSD 3-Clause, GPLv2 and Scratch Source Code License
Filename extensions.sb, .sprite (Scratch 1.x)
.sb2, .sprite2 (Scratch 2.0)
.sb3, .sprite3 (Scratch 3.0)
Websitescratch.mit.edu
Influenced by
Logo, Smalltalk, HyperCard, StarLogo, AgentSheets, AgentCubes, Etoys
Influenced
Catrobat, ScratchJr, Snap!, mBlock, Turtlestitch

Scratch takes its name from a technique used by disk jockeys called "scratching", where vinyl records are clipped together and manipulated on a turntable to produce different sound effects and music. Like scratching, the website lets users mix together different media (including graphics, sound, and other programs) in creative ways by creating and "remixing" projects, like video games, animations, music, and simulations.

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