Variable

A symbol or name that stands for a value. For example, in the expression

x+y

x and y are variables. Variables can represent numeric values, characters, character strings, or memory addresses.

Variables play an important role in computer programming because they enable programmers to write flexible programs. Rather than entering data directly into a program, a programmer can use variables to represent the data. Then, when the program is executed, the variables are replaced with real data. This makes it possible for the same program to processdifferent sets of data.

Every variable has a name, called the variable name, and a data type. A variable’s data type indicates what sort of value the variable represents, such as whether it is an integer, a floating-point number, or a character.

The opposite of a variable is a constant. Constants are values that never change. Because of their inflexibility, constants are used less often than variables in programming.

Vangie Beal
Vangie Beal is a freelance business and technology writer covering Internet technologies and online business since the late '90s.

Top Articles

The Complete List of 1500+ Common Text Abbreviations & Acronyms

From A3 to ZZZ we list 1,559 SMS, online chat, and text abbreviations to help you translate and understand today's texting lingo. Includes Top...

List of Windows Operating System Versions & History [In Order]

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

How to Create a Website Shortcut on Your Desktop

Website Shortcut on Your Desktop reviewed by Web Webster   This Webopedia guide will show you how to create a website shortcut on your desktop using...

Generations of Computers (1st to 5th)

Reviewed by Web Webster Learn about each of the 5 generations of computers and major technology developments that have led to the computing devices that...

Snail Mail

Snail mail, also called direct mail, is a slang term for...

CC vs BCC: What...

CC and BCC are two options to add third-party recipients to...

Eventbrite

  Eventbrite is an online event posting, event management, and ticketing website. Eventbrite can...