JavaScript_Math对象 ——恋天小结

//圆周率var pi = Math.PI;console.log(pi);//0-1之间生成随机数var random = Math.random();console.log(random);//向下取整console.log(Math.floor(2.9));//向上取整console.log(Math.ceil(2.1));//四舍五入console.log(round(3.5));//绝对值console.log(Math.abs(-6));//正弦console.log(Math.sin(30*Math.PI/180));//余弦Math.cos();//指数次幂console.log(Math.pow(2,3));//开方console.log(Math.sqrt(4

));