the most basic definition of the power is: let a be a certain number, n be a positive integer, the nth power of a is expressed as an, which represents the result of multiplying n consecutive a’s, such as 2⁴=2×2×2×2=16 . the definition of power can also be extended to 0th power and negative power, etc. when entering mathematical formulas on the computer, because it is inconvenient to enter powers, the symbol "^" is often used to represent powers. for example, 2 raised to the fifth power is usually represented as 2^5.