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Data having only values "true" or "false"
In computer science, the Boolean is a data type that has one of two possible values representing the two truth values of logic: true and false. It is named
Boolean_data_type
Attribute of data
floating-point numbers (which approximate real numbers), characters and Booleans. A data type may be specified for many reasons: similarity, convenience, or to
Data_type
Extremely basic data type
floating-point numbers, and Boolean logical values. Operations on such types are usually quite efficient. Primitive data types which are native to the processor
Primitive_data_type
Mathematical topics based on the works of George Boole
work of George Boole is considered Boolean. Related to this, "Boolean" may refer to: Boolean data type, a form of data with only two possible values (usually
Boolean
Concept in mathematical logic
false and true. However, many programming languages do not have a Boolean data type in the strict sense. In C or BASIC, for example, falsity is represented
Boolean_domain
Data types supported by the C programming language
<complex.h> allows all these types to be accessed with using complex and imaginary respectively. C99 added a Boolean data type _Bool. Additionally, the <stdbool
C_data_types
Taxonomy of statistical data elements
correlated with data type in computer science, in that dichotomous categorical variables may be represented with the Boolean data type, polytomous categorical
Statistical_data_type
1999 edition of the SQL standard
for a Boolean type. IBM Db2 supports Boolean values since around 11.1. Microsoft SQL Server supports storage for Booleans using "BIT" data type[citation
SQL:1999
Relational database programming language
PRECISION) Decimal floating-point type (DECFLOAT) Datetime types (DATE, TIME, TIMESTAMP) Interval type (INTERVAL) Boolean XML (see SQL/XML) JSON Comparison
SQL
Marker used in SQL databases to indicate a value does not exist
merely syntactic sugar. The ISO SQL:1999 standard introduced the BOOLEAN data type to SQL; however, it is still just an optional, non-core feature, coded
Null_(SQL)
Data whose unit can take on only two possible states
as 0 and 1 in accordance with the binary numeral system and Boolean algebra. Binary data occurs in many different technical and scientific fields, where
Binary_data
Class of computer processors
scalar data type, or just scalar, is any non-composite value. Generally, all basic primitive data types are considered scalar: The Boolean data type (bool)
Scalar_processor
Set of rules defining correctly structured programs
JavaScript provides a Boolean data type with true and false literals. The typeof operator returns the string "boolean" for these primitive types. When used in
JavaScript_syntax
Type of data structure
In distributed computing, a conflict-free replicated data type (CRDT) is a data structure that is replicated across multiple computers in a network, with
Conflict-free replicated data type
Conflict-free_replicated_data_type
Function that outputs either true or false
required to determine a final truth value. Bit Boolean data type Boolean algebra (logic) Boolean domain Boolean logic Propositional calculus Truth table Logic
Boolean-valued_function
General-purpose programming language
enumerated types (enum). Integer type char is often used for single-byte characters. C99 added a Boolean data type. There are also derived types including
C_(programming_language)
Index of articles associated with the same name
or 0) referring to two-element Boolean algebra (the Boolean domain), e.g. Boolean-valued function or Boolean data type in mathematics: something taking
Boolean-valued
programmer intends to use the data. Most programming languages support common data types of real, integer, and Boolean. A data type constrains the values that
Glossary_of_computer_science
Study of collection and analysis of data
correlated with data type in computer science, in that dichotomous categorical variables may be represented with the Boolean data type, polytomous categorical
Statistics
Programming language construct
4 ≥ 3). In programming languages that include a distinct boolean data type in their type system, like Pascal, Ada, Python or Java, these operators usually
Relational_operator
Mathematical model for data types
abstract data type (ADT) is a mathematical model for data types, defined by its behavior (semantics) from the point of view of a user of the data, specifically
Abstract_data_type
Algebraic manipulation of "true" and "false"
In mathematics and mathematical logic, Boolean algebra is a branch of algebra. It differs from elementary algebra in two ways. First, the values of the
Boolean_algebra
include: Truth values in mathematical logic, and the corresponding Boolean data type in computer science, representing a value which may be chosen to be
Binary_decision
Feature of some programming languages
Primitive types such as integers and Booleans cannot generally be null, but the corresponding nullable types (nullable integer and nullable Boolean, respectively)
Nullable_type
Set of rules defining correctly structured programs
IS DISTINCT FROM <row value expression>). SQL:1999 also introduced BOOLEAN data type, which according to the standard can also hold Unknown values if it
SQL_syntax
Type of cryptographic software obfuscation
function which outputs the logical conjunction of its thirty-two Boolean data type inputs produces a program nearly a dozen gigabytes large. Let i O
Indistinguishability obfuscation
Indistinguishability_obfuscation
Computer science concept
data structures, or other data types, such as "string", "array of float", "function returning boolean". The main purpose of a type system in a programming
Type_system
Geometric property of a pair of sets of points in Euclidean geometry
{\displaystyle N>2K} . A Boolean function in n variables can be thought of as an assignment of 0 or 1 to each vertex of a Boolean hypercube in n dimensions
Linear_separability
Value indicating the relation of a proposition to truth
well as various types of logic. In some programming languages, any expression can be evaluated in a context that expects a Boolean data type. Typically (though
Truth_value
English mathematician and philosopher (1815–1864)
resembling logical ones Boolean circuit, a mathematical model for digital logical circuits. Boolean data type is a data type, having two values (usually
George_Boole
Topics referred to by the same term
Australia Bool Lagoon, South Australia, a locality Mount Bool, Antarctica Boolean data type in computer programming Boole (disambiguation) Boul (disambiguation)
Bool
Element of graphical user interfaces
BALLOT BOX WITH X Tick-box culture Radio button Toggle switch (widget) Boolean data type "Check Boxes". msdn. Retrieved February 5, 2010. Nielsen, Jakob (September
Checkbox
Programming language with English-like syntax
data types (until then, binary items were truncated based on their declaration's base-10 specification) Portable arithmetic results Bit and Boolean data
COBOL
General-purpose programming language
as case labels. Where necessary, value types will be boxed automatically. C# supports a strict Boolean data type, bool. Statements that take conditions
C Sharp (programming language)
C_Sharp_(programming_language)
Software engineering technique
on the data types, and are defined in terms of the constructor functions. Consider a formal algebraic specification for the boolean data type. One possible
Algebraic_specification
Data organization and storage formats
of well-known data structures. For a comparison of running times for a subset of this list see comparison of data structures. Boolean, true or false
List_of_data_structures
Language-Independent Type for YAML Version 1.1". YAML.org. Retrieved 2009-09-12. Oren Ben-Kiki; Clark Evans; Brian Ingerson (2005-01-18). "Boolean Language-Independent
Comparison of data-serialization formats
Comparison_of_data-serialization_formats
C programming language standard, 1999 revision
new data types, including long long int, optional extended integer types, an explicit Boolean data type (_Bool), and complex types (_Complex type specifier)
C99
and Java prevent this type of mistake by restricting control expressions to those that evaluate strictly to the boolean data type. Some languages such
Expression-oriented programming language
Expression-oriented_programming_language
Standard library for the C programming language
header files. Each header file contains one or more function declarations, data type definitions, and macros. An implementation of a version of the standard
C_standard_library
Object-oriented programming language
data types Boolean: The Boolean data type has only two possible values: true and false or 1 and 0. No other values are valid. int: The int data type is
ActionScript
Standart data serialization format
represented as the data type "pointed to" with a Boolean "present or not" flag. Semantically this is option type. Structured Data eXchange Format (SDXF)
External_Data_Representation
Conformity to reality
and false are values of constants and variables belonging to the Boolean data type. Truth values play a central role in control structures, which determine
Truth
Changing an expression from one data type to another
computer science, type conversion, type casting, type coercion, and type juggling are different ways of changing an expression from one data type to another
Type_conversion
Variable that can either be true or false
internal structure of the atomic sentences. Boolean algebra (logic) Boolean data type Boolean domain Boolean function Logical value Predicate variable Howson
Propositional_variable
Set of software design patterns in a database
is set up on a table row indicating that the row has changed (e.g., a boolean column that, when set to true, indicates that the row has changed). Otherwise
Change_data_capture
Abstract data type
In computer science, a queue is an abstract data type that serves as an ordered collection of entities. By convention, the end of the queue where elements
Queue_(abstract_data_type)
Computer programming language
non-existent reference. The type Null has exactly one value, called null.: local a = null Bool is a double-valued (Boolean) data type. Its literals are true
Squirrel (programming language)
Squirrel_(programming_language)
Tabular data representation in memory
orientation offers to represent certain data types with dedicated encodings. For example, a table of 128 rows with a Boolean column requires 128 bytes in a row-oriented
Data_orientation
Composite data type
user-defined type (UDT), or compound data type) is a composite data structure – a collection of fields, possibly of different data types, typically fixed
Record_(computer_science)
Data type for values having two types
example, in Java the class Boolean implements both the Serializable and the Comparable interfaces. Therefore, an object of type Boolean can be safely passed
Intersection_type
2025. "Null data type". neo4j.com. Retrieved January 10, 2025. "Boolean data type". neo4j.com. Retrieved January 10, 2025. "Integer data type". neo4j.com
Bolt_(network_protocol)
Representation of data of various types in lambda calculus
by lambda abstraction terms. Types that are usually considered primitive in other notations (such as integers, Booleans, pairs, lists, and tagged unions)
Church_encoding
Abstract data type for storing distinct values
In computer science, a set is an abstract data type that can store distinct values, without any particular order. It is a computer implementation of the
Set_(abstract_data_type)
Set of metadata that contains definitions and representations of data elements
utilization), application security, and extended data types. Visual DataFlex features provides the ability to use DataDictionaries as class files to form middle
Data_dictionary
Standard specifying ASN.1 encoding formats
primitive data types, for example: BooleanType, IntegerType, OctetStringType. (ASN.1 also provides for constructed types built from other types.) Types are
X.690
Square matrix used to represent a graph or network
matrix may be used as a data structure for the representation of graphs in computer programs for manipulating graphs. Boolean data types are used, such as True
Adjacency_matrix
Programming language concept
implement functions of type: boolean equalArrays(Object[] a1, Object[] a2); void shuffleArray(Object[] a); However, if array types were treated as invariant
Type_variance
Spreadsheet file format
NA – not available ERROR – error TRUE – true boolean value FALSE – false boolean value 1 – string type, the second number is ignored, the following line
Data_Interchange_Format
Standard data modeling language for product data
Logical: Similar to the Boolean datatype a logical has the possible values TRUE and FALSE and in addition UNKNOWN. Boolean: With the Boolean values TRUE and FALSE
EXPRESS (data modeling language)
EXPRESS_(data_modeling_language)
Array data structure that compactly stores bits
provide a Data.Bits module with assorted bitwise functions and operators, including shift and rotate operations and an "unboxed" array over Boolean values
Bit_array
Unit described by the data that one analyzes, in statistics
the type of measurement can specify whether the measurement results in a Boolean value from {yes, no}, an integer or real number, the identity of some category
Unit_of_observation
Datum of integral data type
integer is a datum of integral data type, a data type that represents some range of mathematical integers. Integral data types may be of different sizes and
Integer_(computer_science)
Data structure for Boolean functions
decision diagram (BDD) or branching program is a data structure that is used to represent a Boolean function. On a more abstract level, BDDs can be considered
Binary_decision_diagram
File holding settings for a computer program
semantics – e.g. true and "true" are both Boolean if the parser expects a Boolean. Opinions on the value of syntax-typing vary. The following are examples of
Configuration_file
Database of data representing objects in geometric space
(parameter(s)) : return type ST_Distance(geometry, geometry) : number ST_Equals(geometry, geometry) : boolean ST_Disjoint(geometry, geometry) : boolean ST_Intersects(geometry
Spatial_database
Sorting algorithm in computer science
is completed. To avoid stack overflow caused by recursion, use a Boolean data type tag array to operate the recursive function to release the memory
Interpolation_sort
Human-readable data serialization language
explicit data type prefixed by (!!) e: !!str 123 # a string, disambiguated by explicit type f: !!str Yes # a string via explicit type g: Yes # a Boolean True
YAML
Binary tree representing a mathematical expression
represent expressions. Two common types of expressions that a binary expression tree can represent are algebraic and boolean. These trees can represent expressions
Binary_expression_tree
Type that allows only one value
empty type, which allows no values and is the initial object in this category. Similarly, the Boolean is the type with two values. The unit type is implemented
Unit_type
Computer operation which manipulates individual bits of data
Boolean algebra, because unlike regular algebra, several operations do not have inverses. Operations without inverses lose some of the original data bits
Bitwise_operation
Mathematical theory of data types
role to that played by a data type in programming: it specifies what kind of thing an expression is and how it may be used. Type theories are used in the
Type_theory
Expression language for XML documents
condition. XPath 1.0 defines four data types: node-sets (sets of nodes with no intrinsic order), strings, numbers and Booleans. The available operators are:
XPath
Rules defining correctly structured Java programs
The condition must have type boolean or java.lang.Boolean. Java does not implicitly convert integers or class types to Boolean values. For example, the
Java_syntax
Formula and data query language
then the data type of the expression is defined as Variant. The Variant data type is used for expressions that might return different data types, depending
Data_Analysis_Expressions
Set of rules defining correctly structured programs
types: bool, int, float, string. PHP has a native Boolean type, named "bool", similar to the native Boolean types in Java and C++. Using the Boolean type
PHP_syntax_and_semantics
Very high-level programming language
errors in all the others. Another issue is the lack of a Boolean data type and conventional Boolean logic. While the success/fail system works in most cases
Icon_(programming_language)
Virtual machine that runs Java programs
difference between a boolean and a byte except for name mangling in method signatures and the type of Boolean arrays. booleans in method signatures are
Java_virtual_machine
Collection of classes and functions used in the C++ programming language
(contains facilities for static (compile-time) reflection with the info type representing reflection metadata) std::numbers (contains all numeric constants
C++_Standard_Library
Data storage paradigm in computing
There are algorithms that encode basic data types (boolean, string, number) and composition of those data types inside sorted containers (tuple, list,
Ordered_key–value_store
Domain-specific programming language
attribute into the relevant data type, use the "value":datatype notation. See below for examples String, integer, double, and boolean all map directly from
Abbreviated Language for Authorization
Abbreviated_Language_for_Authorization
Encapsulation of an optional value in programming or type theory
implement an Option type, a Boolean type is used as the discriminant; the following example provides a generic to create an option type from any non-limited
Option_type
Gradually typed dialect of Lua
common Luau type annotations : number -- integers and floats : string -- text : boolean -- true or false : any -- variable can be set to any type local baseNumber:
Luau_(programming_language)
Programming language
performed on variables of that type. The predefined types are: The range of values allowed for the basic types (except Boolean) is implementation defined
Pascal_(programming_language)
Correcting inaccurate computer records
used). Data constraints fall into the following categories: Data-Type Constraints: values in a particular column must be of a particular data type, e.g
Data_cleansing
Syntactic entity in a programming language with a determinable value
settings, the resulting value is usually one of various primitive types, such as string, boolean, or numerical (such as integer, floating-point, or complex)
Expression_(computer_science)
Device performing a Boolean function
A logic gate is a device that performs a Boolean function, a logical operation performed on one or more binary inputs that produces a single binary output
Logic_gate
Query entered into a web search engine
Web search queries are distinctive in that they are often plain text and boolean search directives are rarely used. They vary greatly from standard query
Web_query
Computer program for the Boolean satisfiability problem
computer program which aims to solve the Boolean satisfiability problem (SAT). On input a formula over Boolean variables, such as "(x or y) and (x or not
SAT_solver
Computer data interchange format
byte array (for arbitrary binary data) Boolean (true and false) null BSON object BSON array JavaScript code MD5 binary data Regular expression (Perl compatible
BSON
that solves types of the Boolean satisfiability problem despite there being no known efficient algorithm in the general case. The Boolean satisfiability
Boolean satisfiability algorithm heuristics
Boolean_satisfiability_algorithm_heuristics
BASIC programming language dialect
8-bit unsigned BYTE, and the logical BOOLEAN type. The BOOLEAN types were not packed into bytes, a single BOOLEAN used an entire 8-bit byte to store a
BASIC09
Computer data variable
a Boolean variable for signaling special code conditions, such as file empty or full queue statuses. Flags may be found as members of a defined data structure
Flag_(programming)
Markup language
return/newline combination. Importing programmes should accept either. Boolean - The Boolean data type may be either TRUE or FALSE, with TRUE and FALSE in capitals
BeerXML
have a data value attached to them. This attached data value is called the token color. Although the color can be of arbitrarily complex type, places
Coloured_Petri_net
Logical problem studied in computer science
generalizes the Boolean satisfiability problem (SAT) to more complex formulas involving real numbers, integers, and/or various data structures such as
Satisfiability modulo theories
Satisfiability_modulo_theories
Device that selects between several analog or digital input signals
one device per input signal. Multiplexers can also be used to implement Boolean functions of multiple variables. Conversely, a demultiplexer (or demux)
Multiplexer
Python library for data analysis
stored internally as a Series and may hold a different data type (numeric, string, boolean, etc.). DataFrames can be created by a variety of means, including
Pandas_(software)
3-volume treatise on mathematics, 1910–1913
English-language nonfiction books of the 20th century. Axiomatic set theory Boolean algebra Information Processing Language – first computational demonstration
Principia_Mathematica
Programming language developed for the US Navy
and may be arranged for programming convenience. Data types include fixed-point, floating-point, boolean, character and status. Direct reference to, and
CMS-2
travel, tourism, insurance
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BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
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travel, tourism, insurance