Variable
noun · Mathematics
Definition
A symbol, often a letter, representing a quantity that can change or is unknown.
Explanation
In algebra, variables let us write general rules and solve problems with unknown values.
Example
In 2x + 3 = 11, x is the variable.
Common confusion
In science, variable also means a factor that can change in an experiment. In programming, a variable stores a value.
Related terms
- ExpressionA combination of numbers, variables and operations without an equals sign.
- EquationA statement that two expressions are equal.
- CoefficientA number that multiplies a variable.
Study guides that use this term
Entry status: written by the editorial team and awaiting independent review. Spot an error? Use our corrections page.
← All vocabulary