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- DictionaryVar·i·a·ble/ˈverēəb(ə)l/
adjective
- 1. not consistent or having a fixed pattern; liable to change: "the quality of hospital food is highly variable"
- 2. able to be changed or adapted: "the drill has variable speed"
noun
- 1. an element, feature, or factor that is liable to vary or change: "there are too many variables involved to make any meaningful predictions"
In statistics, a variable is a characteristic of interest that you measure, record, and analyze. Statisticians understand them by defining the type of information they record and their role in an experiment or study.
In mathematics, a variable (from Latin variabilis, "changeable") is a symbol that represents a mathematical object. A variable may represent a number, a vector, a matrix, a function, the argument of a function, a set, or an element of a set.
A variable in Mathematics is defined as the alphabetic character that expresses a numerical value or a number. In algebraic equations, a variable is used to represent an unknown quantity. These variables can be any alphabets from a to z. Most commonly, ‘a’,’b’,’c’, ‘x’,’y’ and ‘z’ are used as variables in equations.
- 5 min
- A variable is an alphabetical letter or character that is used to represent an unknown quantity. The value of a variable can vary as per the mathem...
- Let us say, 4x + 5 = 19 is an algebraic expression, then x is the variable and 4 is its coefficient. 5 and 19 here are the constants.
- A dependent variable is a variable in an expression that depends on the value of another variable. For example, if y = 2x, then y depends on x. So,...
- An independent variable is a variable that does not depend on any other variable for its value. For example, in an expression, 2y = 9x + 1, x is an...
- Random variable is the term used in probability theory, whose value depends on the outcome of a random experiment.
Jun 18, 2012 · The first is an Macro while second is an Variable declaration. #define WIDTH 10 is a preprocessor directive that allows you to specify a name ( WIDTH) and its replacement text ( 10 ). The preprocessor parses the source file and each occurrence of the name is replaced by its associated text.
Usage example
const int width = 10;In computer programming, a variable is an abstract storage location paired with an associated symbolic name, which contains some known or unknown quantity of data or object referred to as a value; or in simpler terms, a variable is a named container for a particular set of bits or type of data (like integer, float, string, etc...).
A variable is an object of a class based on the value it stores. Use the type () function to get the class name (type) of a variable.
May 17, 2024 · Variable in Programming is a named storage location that holds a value or data. These values can change during the execution of a program, hence the term “variable.” Variables are essential for storing and manipulating data in computer programs.
