Booleans

Booleans are a language feature.

In computer science, the Boolean data type is a data type that has one of two possible values (usually denoted true and false), intended to represent the two truth values of logic and Boolean algebra.

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Languages without Booleans include Markdown, SQLite, Ini

Languages with Booleans include Java, JavaScript, C, Python, C++, SQL, PHP, Ruby, R, Go, C#, Scala, Swift, MySQL, JSON, Rust, Lua, TypeScript, COBOL, PostgreSQL, Visual Basic, Kotlin, Julia, Pascal, Ada, OCaml, Dart, Groovy, F#, CoffeeScript, Solidity, Crystal, Reason, GraphQL, Modula-2, UML, Modula-3, Simula, PL/SQL, ANTLR, Visual Basic .NET, Oz, Protocol Buffers, HCL, MoonScript, SPARQL, Liquid, F*, ABAP, Lasso, MariaDB, Twig, Nearley, Isabelle, NetLogo, Transact-SQL, wisp, TLA, EDN, Classroom Object Oriented Language, idyll, Click, S-algol, eC, XL, BlitzBasic, ArkScript, Angelscript, Apex, Action!, Augmented Backus-Naur Form, Concise Encoding, spry, Ligo, PowerQuery M, Ezhil, Cell, JSON Lines, Bluespec, Ion, Spin, Jison Lex, Sophia, Amazon Redshift, carth, blockml, Ren, Caché Basic, PLZ, fizz, C/AL, Jupyter Notebook, PROMAL, Freefem, llhd, Arden syntax, Mscgen, opengraph, Friendly Enough Expression Language, mckeeman-form

Example from Go:

c := true

Example from JSON:

false

Example from TypeScript:

const result = true

Example from Ion:

null.bool true false

Example from opengraph:

true false 1 0

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