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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. [9] [10] Users on the site can create projects on the website using a block-like interface.
Scratch, in horse racing, the removal of a horse from a race before it is run; Scratch, in pocket billiards games, the pocketing of the cue ball; Scratch golfer, a golfer with a handicap of zero; Scratch race, a track cycling race in which all riders start together; Scratch track (disambiguation), several meanings
ScratchJr is a derivative of the Scratch language, which has been used by over 10 million people worldwide. Programming in Scratch requires basic reading skills, however, so the creators saw a need for another language which would provide a simplified way to learn programming at a younger age and without any reading or mathematics required.
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The most important features that Snap! offers, but Scratch does not, include: Expressions using anonymous functions, represented by a block inside a gray ring, having one or more empty slot(s)/argument(s) that are filled by a "higher order function" (the one that is calling the anonymous one).
A crab is a type of scratch used by turntablists, combining hand movements on a turntable with rapid manipulation of the crossfader.This technique enables the creation of multiple, rapid sound variations, producing a unique stutter sound that blends audio and silence, giving it an almost robotic quality.
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In computing, scratch input is an acoustic-based method of Human-Computer Interaction (HCI) that takes advantage of the characteristic sound produced when a finger nail or other object is dragged over a surface, such as a table or wall. The technique is not limited to fingers; a stick or writing implements (e.g. chalk, or a pen) can also be used.