Editing Variable (section)

== Mathematics ==

* [[Variable (mathematics)]], a symbol that represents a quantity in a mathematical expression, as used in many sciences
* [[Propositional variable]], taking the value true or false in mathematical logic
* [[Random variable]], a variable in statistics whose value depends on random events
** [[Categorical variable]], taking one of a finite number of values in a statistical problem, such as the head or tail result of a tossed coin
** [[Independent and identically distributed random variables]], statistically independent and having the same probability distribution
* [[Fluent (mathematics)]], a time-varying quantity as coined by Isaac Newton in his early calculus
* [[State variable]], used to describe the mathematical "state" of a dynamical system
* [[Slack variable]], inserted to transform an inequality constraint in an optimization problem into an equality
* [[Dependent and independent variables]], a variable classified according to whether or not it depends for its value on another variable of interest
* [[Free variables and bound variables]], restricted or otherwise to a specified set of values, such as through a logical quantifier
* Complex variable, the argument or value of a function of a complex number in [[complex analysis]]