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Today, I would like to share with you the relevant knowledge of how to calculate exponentiation in javascript. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

Javascript to calculate the power of the method: 1, the use of Math object pow () method, syntax "Math.pow (n, m)", can return the value of the m power of n; 2, the use of the power operator "*", syntax "x * * y", can return the value of the y power of x.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Exponentiation operation

Power (power) is the result of exponential operation. When m is a positive integer, n means that the expression means the multiplication of m n. When m is a decimal, m can be written as a prime b (where an and b are integers), and n "means n" and then open the root sign b times.

When m is an imaginary number, it is necessary to use the Euler formula ei θ = cos θ + isin θ, and then use the logarithmic property to solve the problem.

Think of n times as the result of the power, which is called the m power of n, also known as the m power of n.

How to calculate the exponentiation of javascript

Method 1: use the pow () method

The pow () method returns the value of n to the power of m. If the result is imaginary or negative, the method returns NaN. If a floating-point overflow occurs because the index is too large, the method returns Infinity.

Example: returns the value of 4 to the third power (4 / 4 / 4)

Console.log (Math.pow (4,3))

Method 2: use the exponentiation operator (*)

The power operator (* *) returns the first Operand as the base and the second Operand as the multiplier of the exponent. It is equivalent to Math.pow, except that it also accepts BigInts as an Operand.

Console.log (3 * * 4); / / expected output: 81console.log (10 * *-2); / / expected output: 0.01console.log (2 * * 3 * 2); / / expected output: 512console.log ((2 * * 3) * * 2); / / expected output: 64

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