Language - (Variable | Field)

Card Puncher Data Processing


Variables in a computer language are used to store data information. A variable is a piece of storage containing a value.

Variables created by declarations are identified:

All these variable expressions (x,x[i] or x.f) read the value of a variable, except when they appear on the left-hand side of an assignment, in which case a new value is assigned to the variable.

A variable is considered as the runtime counterpart of a identifier token and therefore are used interchangeably.

Not every value has an address, but every variable does.

Variables are sometimes described as addressable values.

The purpose of variables is to manage:


A variable declaration (aka create) creates a variable of a particular type, attaches a name to it, and sets its initial value.


  • Javascript with they keyword var
var myName;


Variable have the following properties:


Symbolic container

A variable is called a symbolic container (javascript) when the value in this container can vary over time as needed.


Variable expressions:

  • x,
  • x[i]
  • x.f

Documentation / Reference

Recommended Pages
Card Puncher Data Processing
(Data) Type - (Datatype|Type of data)

Variables, parameters, and function may be typed (static typing) and return values that are typed (as do a database column). The type of a variable or expression defines the characteristics of the values...
Bash Liste Des Attaques Ovh
Bash - Parameter

A variable in bash is called a parameter. There is three different type of parameter variables: referenced by a name (Ex: ${myVariable}) positional parameters (ie command/script arguments): referenced...
Card Puncher Data Processing
Code - (Programming|Computer) Language

how the language is structured (grammar), how to name things you want to talk (vocabulary), and the customary and effective ways to say everyday things (usage). ...Grammarvocabularycommunity...B00B8V09HYEffective...
Card Puncher Data Processing
Code - Environment

The environment is the technical name for all the variables—and their values—that exist in the program at a given time. OS environment variable gives the environment for the whole process and therefore...
Card Puncher Data Processing
Code - Grammar / Syntax (Lexical)

This section regroups the entity of a computer language from a lexical point of view. It's the same as Parts of the speech for a natural language. Grammars are useful models when designing software...
Card Puncher Data Processing
Code - Serialization

Serialization is the process of converting a variable (object,...) state into a format that can be stored: Xml Text Avro Flatbuffers Schema ... See
Data System Architecture
Collection - (Tuple|Vector|Row)

A tuple is: a finite list of elements (fields) - It can only contain a specific number of elements. ordered by position that may have different types. and still be completely typesafe. You can...
Weak Typing
Data Type - (Weak|Dynamic) Typing

Weak typing, also known as dynamic typing, allows a variable to hold any type of value at any time. Ie a variable is just a data container without type. The type is only on the value. Dynamic typing,...
Card Puncher Data Processing
Data Type - Dynamic Type (duck-typed or duck languages)

Dynamically typed languages are sometimes referred to as duck-typed or duck languages. The type is not on the variable but on the value. It means that the code has to run to be able to discover the type...
Data Type - Pointer (Locator)

A pointer is the address location at which a value is stored. The pointer is a value that refers directly to (or “points to”) another value stored elsewhere in the computer memory using its address....

Share this page:
Follow us:
Task Runner