Math.ceil 、Math.floor 、 Math.random

向上取整 Math.ceil
//向下取整 Math.floor
//随机数(0-1) Math.random
// var num = 0.14;
// var num1 = 100;

// document.write(Math.ceil(num * num1)+ " ");//15
// document.write(Math.floor(num * num1)+ " ");//14
// document.write(Math.random(num * num1));//0-1之间随机数

标签：num1,floor,random,num,document,Math
来源： https://www.cnblogs.com/wsx123/p/16439458.html