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)
For example:
1. Find a random integer within 1-100
var result = Math.floor(Math.random() * 100 + 1);
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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