Detailed explanation of the use of Math.random() in javascript_javascript skills

Math.random() method returns a random number greater than or equal to 0 and less than 1. For some sites, this method is very practical, because it can be used to randomly display some famous quotes and news events.

1. Obtain a random number from continuous integers

Value = Math.floor(Math.random() * total number of possible values ​​first possible value)
Example: Generate random numbers from 1-10

Write a function that generates random numbers from startNumber to endNumber

2. Obtain a random number from non-adjacent integers

2.1 Obtain a random number from two non-adjacent integers

Example: Randomly generate a number between 2 or 4

2.2 Generate a random number from multiple non-adjacent integers

Combined with the function parameter array, you can write a function that generates a random value among multiple non-adjacent integers

It is troublesome to enter so many parameters every time. You can rewrite the function

Or without changing the original method, you can use the apply() method to pass array parameters

For information about the use of the apply method, please see http://www.jb51.net/article/42705.htm

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