variable
n. something given to variation; quantity that may represent any one of a set of values (Mathematics); star whose brightness variates at intervals (Astronomy) | ||||
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Variables&tl= definition was found in categories: Computer & Internet(3) Language, Idioms & Slang(1) Science & Technology(1) Encyclopedia(1)
Variables&tl= Definition from Computer & Internet Dictionaries & Glossaries
| FOLDOC |
variable
<programming> A named memory location in which a program can store intermediate results and from which it can read it them. Each programming language has different rules about how variables can be named, typed, and used. Typically, a value is "assigned" to a variable in an assignment statement. The value is obtained by evaluating an expression and then stored in the variable. For example, the assignment
x = y + 1
means "add one to y and store the result in x". This may look like a mathematical equation but the mathematical equality is only true in the program until the value of x or y changes. Furthermore, statements like
x = x + 1
are common. This means "add one to x", which only makes sense as a state changing operation, not as a mathematical equality.
The simplest form of variable corresponds to a single-word of memory or a CPU register and an assignment to a load or store machine code operation.
A variable is usually defined to have a type, which never changes, and which defines the set of values the variable can hold. A type may specify a single ("atomic") value or a collection ("aggregate") of values of the same or different types. A common aggregate type is the array - a set of values, one of which can be selected by supplying a numerical index.
Languages may be untyped, weakly typed, strongly typed, or some combination. Object-oriented programming languages extend this to object types or classes.
A variable's scope is the region of the program source within which it represents a certain thing. Scoping rules are also highly language dependent but most serious languages support both local and global variables.
In a functional programming language, a variable's value never changes and change of state is handled as recursion over lists of values.
(2003-12-23)
<programming> A named memory location in which a program can store intermediate results and from which it can read it them. Each programming language has different rules about how variables can be named, typed, and used. Typically, a value is "assigned" to a variable in an assignment statement. The value is obtained by evaluating an expression and then stored in the variable. For example, the assignment
x = y + 1
means "add one to y and store the result in x". This may look like a mathematical equation but the mathematical equality is only true in the program until the value of x or y changes. Furthermore, statements like
x = x + 1
are common. This means "add one to x", which only makes sense as a state changing operation, not as a mathematical equality.
The simplest form of variable corresponds to a single-word of memory or a CPU register and an assignment to a load or store machine code operation.
A variable is usually defined to have a type, which never changes, and which defines the set of values the variable can hold. A type may specify a single ("atomic") value or a collection ("aggregate") of values of the same or different types. A common aggregate type is the array - a set of values, one of which can be selected by supplying a numerical index.
Languages may be untyped, weakly typed, strongly typed, or some combination. Object-oriented programming languages extend this to object types or classes.
A variable's scope is the region of the program source within which it represents a certain thing. Scoping rules are also highly language dependent but most serious languages support both local and global variables.
In a functional programming language, a variable's value never changes and change of state is handled as recursion over lists of values.
(2003-12-23)
| Vb Glossary 1.0 |
Variables
In Visual Basic, you use variables to temporarily store values during the execution of an application. Variables have a name (the word you use to refer to the value the variable contains) and a data type (which determines the kind of data the variable can store).
In Visual Basic, you use variables to temporarily store values during the execution of an application. Variables have a name (the word you use to refer to the value the variable contains) and a data type (which determines the kind of data the variable can store).
| DW and OLAP terms |
variables
Defined entities that are assigned values. A local variable is defined with a DECLARE@localvariable statement and assigned an initial value within the statement batch where it is declared with either a SELECT or SET@localvariable statement.
Defined entities that are assigned values. A local variable is defined with a DECLARE@localvariable statement and assigned an initial value within the statement batch where it is declared with either a SELECT or SET@localvariable statement.
Variables&tl= Definition from Language, Idioms & Slang Dictionaries & Glossaries
| WordNet 2.0 |
variable
Noun
1. something that is likely to vary; something that is subject to variation; "the weather is one variable to be considered"
(hypernym) thing
2. a quantity that can assume any of a set of values
(synonym) variable quantity
(hypernym) quantity
(hyponym) argument
3. a star that varies noticeably in brightness
(synonym) variable star
(hypernym) star
(hyponym) Polaris, North Star, pole star, polar star, polestar
4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
(hypernym) symbol
(hyponym) placeholder
Adjective
1. liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
(antonym) invariable
(similar) changeable, uncertain, unsettled
(see-also) inconsistent
2. marked by diversity or difference; "the varying angles of roof slope"; "nature is infinitely variable"
(synonym) varying
(similar) varied
3. (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"
(similar) adaptable
Noun
1. something that is likely to vary; something that is subject to variation; "the weather is one variable to be considered"
(hypernym) thing
2. a quantity that can assume any of a set of values
(synonym) variable quantity
(hypernym) quantity
(hyponym) argument
3. a star that varies noticeably in brightness
(synonym) variable star
(hypernym) star
(hyponym) Polaris, North Star, pole star, polar star, polestar
4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
(hypernym) symbol
(hyponym) placeholder
Adjective
1. liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
(antonym) invariable
(similar) changeable, uncertain, unsettled
(see-also) inconsistent
2. marked by diversity or difference; "the varying angles of roof slope"; "nature is infinitely variable"
(synonym) varying
(similar) varied
3. (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"
(similar) adaptable
Variables&tl= Definition from Science & Technology Dictionaries & Glossaries
| Technical English by wpv |
Variables
factors in an experiment that may change or have different values.
factors in an experiment that may change or have different values.
Variables&tl= Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Variable
In computer science and mathematics, a variable (IPA pronunciation: ) (sometimes called a pronumeral) is a symbolic representation denoting a quantity or expression. In mathematics, a variable often represents an "unknown" quantity that has the potential to change; in computer science, it represents a place where a quantity can be stored. Variables are often contrasted with constants, which are known and unchanging.
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