Detailed explanation of how to find random numbers in js

小云云
Release: 2023-03-22 22:18:02
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This article mainly shares with you the detailed explanation of the method of finding random numbers in js. It mainly shares it with you in text and code. I hope it can help you.

Find a randomly selected value within a certain positive range:

值 = Math.floor(Math.random() * 可能值的总数 + 第一个可能的值)
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For example:

1. Find a random integer within 1-100

var result = Math.floor(Math.random() * 100 + 1);
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2. Randomly take out an item from an array

var array = ['a','b','c','d','e','f','g'];

/*array.length === 7,取0-6之间的随机整数*/
var index = Math.floor(Math.random() * 7 + 0);

/*随机取的结果是*/
var result = array[index];
console.log(result);
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