x = 2. Variables are also categorized based on their behaviour.

Terms, variables, constants, coefficients A variable is a symbol (usually letter/letters) used to represent: a) an unknown quantity (number) b) any one of many numbers to indicate a general principle. Let us consider a garment whose cost is  x dollars.

It can’t be changed. Constants are that part of the algebraic expression that involve only numbers. Pro, Vedantu A representation of the unknown value is said to be variable. Constants are often used to represent numbers with physical significance. From the above table now you have a clear picture of what is the difference in constant and variable.

Answer: In Mathematics an algebraic expression is a set of integers, variables, constants and mathematical operations like addition subtraction, multiplication, and division that is equated by 0. In statistics, independent and dependent variables are termed as Explanatory variable and Response variable respectively. Problem 1 : Solve for x : x - 2 = 0. Difference Between Constant and Variables. Alphabets like a,b,c …..x,y, z, any of these are used as variables In Mathematics the value of one variable is often dependent on the value of other variables. Few of the use of variables are as follows. For example Consider an equation 2 + 3 = 5. What is the value of \$100 currency when i have it in Sancfrancisco ? From the above questions and answers, one thing is very clear. Let us look at some problems on simple equations to have better understanding on variables. 3x + 5y = 7 where x and y are variables that are changed according to the expression. In probability and statistics, a random variable is a variable that can assume different states or events in the considered set of events. The retailer sells it to the customer at the cost of \$50. Variables and Constants in Algebraic Expressions, Difference Between Dealer and Distributor, Difference Between Environment and Ecosystem, Difference Between Chromatin and Chromosomes, Difference between Cytoplasm and Protoplasm, Difference Between Respiration and Combustion, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables, NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables, NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables (Ex 3.6) Exercise 3.6, NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables in Hindi, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables In Hindi, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables (Ex 4.3) Exercise 4.3, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables (Ex 4.4) Exercise 4.4, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables (Ex 4.2) Exercise 4.2, NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables (Ex 4.1) Exercise 4.1, NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables (Ex 3.7) Exercise 3.7, Important Questions for CBSE Class 9 Maths Chapter 4 - Linear Equations in Two Variables, Important Questions for CBSE Class 10 Maths Chapter 3 - Pair of Linear Equations in Two Variables, CBSE Class 8 Science Force and Pressure Worksheets, CBSE Class 8 Science Combustion and Flame Worksheets, CBSE Class 7 Science Motion and Time Worksheets, CBSE Class 6 Science Electricity and Circuits Worksheets, CBSE Class 8 Science Coal and Petroleum Worksheets, CBSE Class 7 Science Physical and Chemical Changes Worksheets, CBSE Class 8 Science Microorganisms : Friend and Foe Worksheets, CBSE Class 8 Science Crop Production and Management Worksheets, CBSE Class 10 Maths Chapter 3 - Pair of Linear Equations in Two Variables Formula, Class 9 Maths Revision Notes for Linear Equations in Two Variables of Chapter 4, Class 10 Maths Revision Notes for Pair of Linear Equations in Two Variables of Chapter 3, CBSE Class 7 Maths Chapter 2 - Fractions and Decimals Formulas, CBSE Class 8 Maths Chapter 12 - Exponents and Powers Formulas, CBSE Class 9 Maths Chapter 6 - Lines and Angles Formulas, CBSE Class 6 Maths Chapter 12 - Ratio and Proportion Formulas, CBSE Class 7 Maths Chapter 13 - Exponents and Powers Formulas, CBSE Class 7 Maths Chapter 5 - Lines and Angles Formulas, CBSE Class 12 Maths Chapter-5 Continuity and Differentiability Formula, WBJEE Mathematics Syllabus 2020 PDF Download, WBJEE Mathematics Previous Year Question Papers 2016, WBJEE Mathematics Previous Year Question Papers 2018, WBJEE Mathematics Previous Year Question Papers 2019, WBJEE Mathematics Previous Year Question Papers 2015, WBJEE Mathematics Previous Year Question Papers 2017, TANCET Basic Engineering and Science Question Paper 2017, TS EAMCET Medical and Agriculture Question Paper 2017, CBSE Class 10 English Language & Literature Question Paper 2017 - Free PDF, English Language and Literature Question Paper for CBSE Class 10 - 2010, Vedantu Answer: A variable is any value of any equation that is not fixed it can be changed at any point if time. Variables are usually represented by alphabets. Some English alphabets will have fixed values, but the values will be unknown. A variable is any value of any equation that is not fixed it can be changed at any point if time. For example, consider π and e. Avagardro’s constant (L) represents a very large number, which is 6.022 ×1023 mol-1. In mathematics, a constant is a quantity that does not change its value. Even though we have a single value to be found why to use a variable in place of an unknown value the reason is for the equation having more than one variable.

A value that keeps on changing is said to be variable. Both the LHS and RHS are balanced to each other. Add 2 to each side. If you want to add 4 to LHS it should be added to RHS too, to balance the equation. Its value changes from time to time. The concepts have stemmed out into other fields, such as physics and computer science for this reason. Variables are so important in computers, science experiments and mathematical equations. If the variable’s changes are not based on other factors, it is called an independent variable. What is the value of \$100 currency when i have it in Chicago? It is definite. Pro, Vedantu Planks number is not just a mathematical entity, but it has broad physical interpretations). Variable and constant are two commonly used mathematical concepts.

It also can represent a rule between two unknown quantities like y=f(x)=x3+4x+9. A constant does not change its value and it remains the same forever.
All rights reserved. Therefore, x is considered to be variable. Below is the tabular format of the difference between variable and constant. It is not changed in different parts of the country. We call them constants because the value is always the same. If the variable’s changes are based on some other variable(s), then it is known as a dependent variable. What is the value of \$100 currency when i have it in Newyork ? The wholesaler sells it to the retailer at the cost of \$44.

Simply put, a variable is a value that is changing or that have the ability to change. Let us look at some problems on simple equations to have better understanding on variables. It will make you more clear what is variable and constant. Apart from the stuff given in this section, if you need any other stuff in math, please use our google custom search here. The symbol which has a fixed value is called as constant. Answer: A representation of the unknown value is said to be variable. What is the difference between Variables and Constants? Then, k will have only one fixed value and it is unknown. So, the value of x is 2. In mathematics, it is customary to emphasize the valid values for the variable, which is called the range. Here the height of a kid is variable because it will keep on changing over the period of time but the dress of a kid will remain the same forever so it is a constant. Both the LHS and RHS are balanced to each other. After solving the lengthy equation the variables can be replaced by the real values which makes it quite easy. There are no variables in the term that can change the value of the constant. Variables can be used to represent unknowns in equations such as x2-2x+4=0. A constant is a value which remains unchanged. For  example, let k be arbitrary constant. It refers to a block memory in the program where different values can be stored. Variables are so important in computers, science experiments and mathematical equations. These limitations are deduced from the general properties of the equation or by definition.
• Constants are used to represent quantities in nature which are fixed, and the variables are used to represent unknowns. After solving the lengthy equation the variables can be replaced by the real values which makes it quite easy.

• Both constants and variables are represented algebraically by English or Greek letters. In physics, chemistry, and any other natural science, you will encounter constants, which are specific letters assigned to represent values of quantities in nature or a mathematical theory. Constant has a fixed value and its value cannot be changed by any variable. Hence, the cost of the garment x is variable.