Exponent

An exponent is the number of times another number is multiplied by itself in exponentiation.

For example: The exponent in $2\cdot2\cdot2$ is 3. This can also be written as 2³. The exponent in $4\cdot4\cdot4\cdot4\cdot4$ is 5. This can also be written as 4⁵.

Exponents are used in algebra.

It is a number or symbol, placed above and to the right of the expression to which it applies, that indicates the number of times the expression is used as a factor. For example, the exponent 3 in 5³ indicates $5 \cdot 5 \cdot 5$; the exponent x in (a + b)^x indicates (a + b) multiplied by itself x times.