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Data having only values "true" or "false"
In computer science, the Boolean (sometimes shortened to Bool) is a data type that has one of two possible values (usually denoted true and false) which
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
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
Network that allows computers to share resources and communicate with each other
formatted unit of data carried by a packet-switched network. Packets consist of two types of data: control information and user data (payload). The control
Computer_network
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
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
Conformity to reality
and false are values of constants and variables belonging to the Boolean data type. One of their key applications happens in control structures that
Truth
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
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)
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
Data organization and storage formats
comparison of running times for a subset of this list see comparison of data structures. Boolean, true or false. Character Floating-point representation of a finite
List_of_data_structures
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
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
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
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
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
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
Abstract data type
shift(); } isEmpty(): boolean { return this.items.length === 0; } } Queues can also be implemented as a purely functional data structure. There are two
Queue_(abstract_data_type)
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
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
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
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
Computer science topic
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
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
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)
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)
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
Set of metadata that contains definitions and representations of data elements
range, etc. Is-required (Boolean) - If 'true', the value cannot be blank, null, or only white-spaces Is-read-only (Boolean) Reference table name, if
Data_dictionary
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)
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
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
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
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
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)
Correcting inaccurate computer records
values in a particular column must be of a particular data type, e.g., Boolean, numeric (integer or real), date. Range Constraints: typically, numbers
Data_cleansing
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
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
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
Representation of natural numbers and other data 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
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
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
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)
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
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
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
Data-interchange format
escaping syntax. Boolean: either of the values true or false Array: an ordered list of zero or more elements, each of which may be of any type. Arrays use
JSON
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
Formula and data query language
the decimal part represents the time in terms of its fraction of a day) Boolean (called True/false in Power BI, either the value TRUE or the value FALSE)
Data_Analysis_Expressions
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
or l-values, as appropriate. R, S and T stand for a data type, and K for a class or enumeration type. Some operators have alternative spellings using digraphs
Operators_in_C_and_C++
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
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
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
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
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
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)
Order-preserving mathematical function
and Boolean. Monotone cubic interpolation Pseudo-monotone operator Spearman's rank correlation coefficient - measure of monotonicity in a set of data Total
Monotonic_function
Programming language designed 1942 to 1945
Boolean (German: Ja-Nein-Werte – yes-no value in Zuse's terminology). It is denoted by the identifier S 0 {\displaystyle S0} . All the further data types
Plankalkül
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
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
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)
Search using the full text of documents
to specific fields within a stored data record, such as "Title" or "Author." Boolean queries: Searches using Boolean operators (for example, "encyclopedia"
Full-text_search
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)
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
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
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
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
Encoded data represented in binary notation
characters are often represented as either decimal or hex. Some types of data such as image data is sometimes represented as hex, but rarely as decimal. The
Binary_code
Software that provides access that hides details
greater importance. Examples include the abstract data type which separates use from the representation of data and functions that form a call tree that is
Abstraction (computer science)
Abstraction_(computer_science)
Comparison of two programming languages
49 and chr(9) is a TAB character. In Pascal, boolean is an enumerated type. The possible values of boolean are false and true, with ordinal value of false = 0
Comparison_of_Pascal_and_C
Extensible Access Control Markup Language
Value; Boolean attributes (CombinedDecision, ReturnPolicyIdList, MustBePresent, IncludeInResult, etc.) made optional with default values; DataType attribute
XACML
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)
Named set of data type values
enumerator types may be built into the language. The Boolean type for example is often a pre-defined enumeration of the values false and true. A unit type consisting
Enumerated_type
Discrete set of Boolean variables
A Boolean network consists of a discrete set of Boolean variables each of which has a Boolean function (possibly different for each variable) assigned
Boolean_network
API for Java
is an example of a database transaction: import java.sql.SQLException; boolean autoCommitDefault = conn.getAutoCommit(); try { conn.setAutoCommit(false);
Java_Database_Connectivity
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
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
Female
Slavic
 Short form of Slavic Bogdana, DANA means "gift from God." Compare with other forms of Dana.
Male
Iranian/Persian
 Short form of Persian Dârayavahush, DARA means "possesses a lot, wealthy." Compare with other forms of Dara.
Female
Hebrew
(×“Ö¼Ö¸× Ö¸×”) Feminine form of Hebrew Dan, DANA means "judge." Compare with other forms of Dana.
Male
Irish
Irish Gaelic name MAC DARA means "son of oak." This is the name of a patron saint and is still common in Ireland, especially in Connemara.
Female
Polish
Short form of Polish Edyta, DYTA means "rich battle."
Female
Russian
 Short form of Russian Yekaterina, KATA means "pure." Compare with other forms of Kata.
Male
Hebrew
(דֶּרַע) Hebrew name DARA means "the arm." In the bible, this is the name of a son of Zerah. Compare with other forms of Dara.
Female
English
 English surname transferred to unisex forename use, possibly DANA means "from Denmark." Compare with other forms of Dana.
Female
Hindi/Indian
(लता) Hindi name derived from a plant name, from the Sanskrit word lata, LATA means "creeper," in reference to a creeping plant.
Surname or Lastname
English
English : variant of Wool.Americanized form of Jewish Wollman or German Wollmann (see Wollman).
Female
Hebrew
(דִּיתָה) Pet form of Hebrew Yehuwdiyth, DITA means "Jewess" or "praised." Compare with another form of Dita.
Female
Hungarian
 Short form of Hungarian Katalin, KATA means "pure." Compare with other forms of Kata.
Male
Turkish
Turkish name ATA means "ancestor."
Male
Hebrew
Variant spelling of Hebrew Dathan, DATAN means "belonging to a fountain."
Female
Polish
 Variant spelling of Polish Dyta, DITA means "rich battle." Compare with another form of Dita.
Female
Finnish
Variant form of Finnish Aada, AATA means "noble."
Female
Finnish
 Short form of Finnish Katariina, KATA means "pure." Compare with other forms of Kata.
Female
English
 Middle English name DARA means "brave, daring." Compare with another form of Dara.
Male
English
English surname transferred to unisex forename use, possibly DANA means "from Denmark."
Male
Irish
 From Irish Gaelic Mac Dara, DARA means "son of oak." Compare with other forms of Dara.
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
Girl/Female
Tamil
Varunavi | வரà¯à®¨à®¾à®µà¯€
Goddess Laxmi
Girl/Female
Hebrew American Greek
or Elizabeth, from Elisheba, meaning either oath of God, or God is satisfaction. Also a...
Boy/Male
Hindu, Indian
Wind
Boy/Male
Hindu
Lord Krishna
Boy/Male
Indian
Lord Rama
Female
French
Feminine form of French Aurèle, AURÉLIE means "golden."
Biblical
the hand of the Lord; confessing Jehovah
Boy/Male
Indian, Punjabi, Sikh
Embodiment of Victory
Female
Hebrew
(רֵעַ) Hebrew name RAYA means "friend." Compare with another form of Raya.
Girl/Female
Gujarati, Hindu, Indian
Illusion
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
BOOLEAN DATA-TYPE
v. t.
To date erroneously.
pl.
of Bookman
n.
Prior date; a date antecedent to another which is the actual date.
a.
Of or pertaining to Sir Thomas Bodley, or to the celebrated library at Oxford, founded by him in the sixteenth century.
imp. & p. p.
of Date
n.
The point of time at which a transaction or event takes place, or is appointed to take place; a given point of time; epoch; as, the date of a battle.
a.
Being out of date; antiquated.
pl.
of Datum
a.
Having the characteristic of Zoilus, a bitter, envious, unjust critic, who lived about 270 years before Christ.
n. pl.
See Datum.
n.
A studious man; a scholar.
a.
Made of wool; consisting of wool; as, woolen goods.
a.
Of or pertaining to wool or woolen cloths; as, woolen manufactures; a woolen mill; a woolen draper.
pl.
of Woolman
n.
The fruit of the date palm; also, the date palm itself.
v. t.
To note the time of writing or executing; to express in an instrument the time of its execution; as, to date a letter, a bond, a deed, or a charter.
n.
One who deals in wool.
p. pr. & vb. n.
of Date
n.
That addition to a writing, inscription, coin, etc., which specifies the time (as day, month, and year) when the writing or inscription was given, or executed, or made; as, the date of a letter, of a will, of a deed, of a coin. etc.
v. t.
To note or fix the time of, as of an event; to give the date of; as, to date the building of the pyramids.