A number's power indicates how many times that number must be used in multiplication. Powers are also called exponents or indices. For example, 8^2 means "8 squared", "8 squared", or simply "8 squared".
Fundamentally, a power is an expression that indicates repeated multiplication of the same number or factor. The exponent value is based on the number of times the base is multiplied by itself.
For example 8 x 8 x 8 x 8 x …..n times = 8. The above expression, 8n, is said as 8 raised to the power n. Therefore, exponents are also called power or sometimes indices.