JavaScript-Math方法

1 console.log(Math.abs(-10));

1 console.log(Math.floor(3.8));//向下舍入，小数点省略了

1 console.log(Math.ceil(3.2));//向上舍入，进位

console.log(Math.round(2.55));//四舍五入为整数

1 var max=Math.max(3,5,7,9,10);
2 console.log(max);

var min=Math.min(3,5,7,9,10);
console.log(min);

1 var num=Math.pow(2,2);
2 console.log(num);

1 // 两点距离公式
2 function getDistance(point1,point2){
3     return Math.sqrt(Math.pow(point2.x-point1.x,2)+Math.pow(point2.y-point1.y,2));
4 }
5 var point1={x:100,y:100};
6 var point2={x:200,y:200};
7 var v=getDistance(point1,point2);
8 console.log(v);