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{{DISPLAYTITLE:Snap''!'' (programming language)}}
{{Infobox programming language
| name = Snap''!''
| logo = [[File:Snap!.svg|200px]]
| logo size = 90PX
| paradigm = [[Object-oriented programming|object-oriented]], [[educational programming language|educational]], [[Event-driven programming|event-driven]]
| year = {{start date and age|2011}}
| designer = [[Brian Harvey (lecturer)|Brian Harvey]] and [https://github.com/jmoenig/ Jens Mönig]
| developer = [https://github.com/jmoenig/ Jens Mönig]
| latest release version =
| latest release date = {{Start date and age|
| typing = [[Type system|dynamic]]
| implementations =
| programming language = Morphic.js<ref name="morphic_js">{{cite web |last1=Mönig |first1=Jens |title=morphic.js |url=https://github.com/jmoenig/morphic.js/blob/master/morphic.txt |website=GitHub |accessdate=7 June 2023}}</ref> (written in [[JavaScript]]); {{#tag:ref|BYOB was written in [[Squeak]].|group=Note}}
| dialects =
| influenced by = [[Scratch (programming language)|Scratch]], [[Scheme (programming language)|Scheme]], [[Logo (programming language)|Logo]], [[Smalltalk]], [[APL (programming language) | APL]]
| influenced = [[Scratch (programming language)|Scratch]], BeetleBlocks, NetsBlox, Dragme IDE, [[Turtlestitch]]
| operating system = [[Cross-platform]]
| license = [[Affero General Public License|AGPL]]
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}}
'''Snap''!''''' (formerly Build Your Own Blocks) is a free block-based [[List of educational programming languages|educational]] graphical programming language and online community. Snap allows students to explore, create, and remix interactive animations, games, stories, and more, while learning about mathematical and computational ideas. While inspired by [[Scratch (programming language)|Scratch]], Snap''!'' has many advanced features. The Snap''!'' editor, and programs created in it, are [[web application]]s that run in the browser (like [[Scratch (programming language)|Scratch
==User interface==
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| bgcolor="#BB42C3"| || Sound || Plays audio files and <br />programmable sequenced audio || bgcolor="#5CB712"| || Operators || Mathematical, text, and<br />Boolean operators; lambda
|- valign="top"
| bgcolor="#0E9A6C"| || Pen || Write, draw, or<br />stamp on stage || bgcolor="#C88330"| || Variables || Variables, lists,<br />including lists of lists, lists of blocks, etc
|}
[[File:Snap! Default interface.png|thumb|left|420px|''Three resizable columns, containing five regions, in Snap!'s [[Integrated development environment|IDE]] at startup'']]
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The central area can show scripts, costumes/backdrops, or sounds associated with the selected sprite. What that area shows depends on the selected tab.
{{clear}}
==Features==
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). (Their computer-science theoretical basis is [[first class function]]s, which in turn have [[lambda calculus]] as their even more abstract and mathematical foundation)
* Lists that are [[First class object|first class]] (including ''lists of lists/arrays'')
* ''First class'' sprites (or in other words, [[
* "Hyperblocks": functions whose natural ___domain is scalars (text or numbers), extended to accept lists as inputs and apply the underlying function to the scalars in the list or a sublist
* Nestable sprites
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==Mascot==
[[File:Snap! mascot, Alonzo.svg|50px|right]]
Alonzo, the mascot of Snap''!'', bears the name of [[Alonzo Church]], the inventor of a model of computation in which a universal function, represented by lambda, can create any function behavior by calling it on itself in various combinations. The mascot is a modified version of Gobo from [[Scratch (programming language)|Scratch]], with permission of the Scratch
==Special-purpose blocks (libraries)==
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While the software itself has little restraints, it does have some limitations.
These include
* No native cloud variables
* 10 [[megabyte]] file cap for uploading (Snap''!'' Cloud only)
* Users have to manually enable Javascript when loading a project that uses inline bits of JS, due to a hack a few years ago.
==History==
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==Platforms==
Snap! runs on the major web-browsers on [[Microsoft Windows|Windows]], [[iOS]], [[
Supported web-browsers such as
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==Recognition==
Snap''!'' has been recognized by the Logo Foundation,<ref>{{cite web|url=http://el.media.mit.edu/logo-foundation/what_is_logo/history.html|title=Logo History|website=el.media.mit.edu|access-date=21 May 2017}}</ref> and reviewed in an online magazine for programmers.<ref>{{cite web|url=http://www.i-programmer.info/news/98-languages/8628-visual-language-snap-version-40-released.html|title=Visual Language Snap! Version 4.0 Released|first = Sue|last=
==Notes==
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==External links==
* {{Official website|snap.berkeley.edu}}
{{Video game engines |state=collapsed}}
{{DEFAULTSORT:Snap! (Programming Language)}}
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