# What is a Variable Mean in Math?-Types of variables in math

In Math, a variable is an alphabet or term that denotes an unknown value or unknown number, or unknown quantity. The variables are specially used in the case of algebra or algebraic expression.

Â For example, y+3=4 is a linear equation where y is a variable, where 3 and 4 are constants. The variable is a value that is not fixed that can be changed or according to the mathematical operation performed. Usually, in algebra, we express an unknown number using the term â€˜xâ€™ and â€˜yâ€™. But this is not particular, and we can use any alphabet.

**Definition of Variable**

In Math, a variable is an alphabet or term that denotes an unknown value or unknown number, or unknown quantity. The variables are specially used in the case of algebra or algebraic expression.

Â These variables can be any alphabet from a to z. Most commonly are used, as variables in equationsâ€˜ aâ€™,â€™bâ€™,â€™câ€™, â€˜xâ€™,â€™yâ€™ and â€˜zâ€™ .The variable is a value that is not fixed that can be changed or according to the mathematical operation performed.

*Example of variable*

- X+3=5
- Y+4=12
- 5X-2=3

In the above example, y, and x are called variables. Without x and y terms are called the constant.

**Types of variables in math**

The variables can be divided into two categories, namely

- Dependent variable
- Independent variable

**Application of variable**

Variables are not used in the field of Mathematics but also in distinct other fields for different purposes, such as:

- Statistics
- Research
- Science
- Programming

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