Exponentiation
When it is a positive integer, the exponent indicates how many copies of the base are multiplied together. For example, . The base appears times in the repeated multiplication, because the exponent is . Here, is the "base", is the "exponent", and is the "power" or, more specifically, "3 raised to the 5th power".
Exponential factorial
The exponential factorial of a positive integer "n", denoted by "n"$, is "n" raised to the power of "n" − 1, which in turn is raised to the power of "n" − 2, and so on and so forth, that is,