Difference between Variable and Parameter

Parameter and variable are terms generally utilized as a very important component in the fields of physics, science, mathematics, analysis and statistics. These two are usually misjudged as a similar element. A variable is an element that progressions as for another element. A parameter is an element which is utilized to interface factors.


In field of mathematics, a variable defines as an alphabetic element speaking to a number, known as estimation of the variable that is self-assertive, not completely determined, or obscure. The expression “variable” originates from the way that, when the contention (additionally called the “variable of the Function”) shifts, then the esteem changes appropriately.


A parameter, by and large, is an entity that can help in characterizing or grouping a specific framework. That is, a parameter is a component of a system that is helpful, or basic. Inside and over different fields, watchful refinement must be kept up of the diverse utilizations of the term parameter and of different terms frequently connected with it.

Variable VS Parameter

In this article, we will talk about variable and parameter, their definitions and the contrast amongst these two terms.

  • Definition:

A variable can be defined as an element that alters as for another element in a given specific system. In other words, the estimation of variable fluctuates relying upon conditions.

A parameter is an element which is utilized to associate variable or brings together at least two variables of a condition or “connection” between two variables.

  • Types:

Variable is of two types that are dependent and independent variables.  Dependent variable alters with the adjustment in independent variable whereas there is no change in independent variable due to change in dependent variable. Variables are also categorized in two ways that is continuous or discrete variable.

In case of parameter, there are no such types or categories.

  • Number required:

When we use variables in an equation, we need more number of variables to explain the system. Let’s take an example of an equation that speaks a circle of having unit radius with center at cause of coordinate system.

x^2 + y^2 = 1

In this equation there are two variables x and y to define the system.

When we come to parameters we need lesser number of parameters to define the system as compare to number of variables. Let’s convert the above equation in parametric form so we get

x=cos (w)   , y=sin (w)

In this form w is parameter that changes from 0-2π.  In this we have only one parameter instead of two variables.

  • Alphabets:

To explain the variables in the system, we mostly use x, y and z.

To explain the parameters in the system, we mostly use a, b and c as sometimes it moves to e and f.


From the above article we can conclude that variable is an element that doesn’t have any fixed value and parameter may or may not vary in a system. There are types of variables whereas parameters don’t have any categories or types. We can use lesser number of parameter rather than more number of variables.