The most basic definition of power is: let a be a number, n be a positive integer, a to the power of n is represented by an, which represents the result of n a's multiplication, such as 2⁴=2×2×2×2=16. The definition of power can also be extended to 0 power and negative power, etc. When entering mathematical formulas on the computer, the symbol "^" is often used to represent power because it is inconvenient to enter power. For example, 2 to the power of 5 is usually represented as 2^5.