How does JavaScript create random integers

This article introduces the knowledge of "how to create random integers in JavaScript". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

JavaScript to create a random integer method: 1, use the "Math.random ()" statement to generate random decimals in the range of "0" 1 "; 2, the random decimal multiplied by an integer value, it will be expanded by a specified multiple; 3, the random number will be rounded down with the" Math.floor () "statement, you can get a random integer.

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

JavaScript has a function that provides a random decimal with a value range of (0,1).

Math.random (); / / 0.10529863457509858

Then we use this function to generate a specified range of random integers.

Function randomRange (min, max) {/ / min minimum, max maximum return Math.floor (Math.random () * (max-min)) + min;}

The principle is to first subtract the maximum value from the minimum worthy of travel (guaranteed not to exceed the maximum value), multiply it with a random decimal, then add the minimum value (make sure it is not less than the minimum value), and finally round it down.

If you use it, pass in the minimum and maximum values you want to specify to the function.

Console.log (randomRange (0, 1000)

Isn't it easy.

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