javascript中常见的内置对象有哪些(2)-木庄网络博客

2022-02-10 17:44:35 PHP中文网 JavaScript 百度已收录

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <script>
        console.log(Math);
        console.log(Math.PI);//输出为π
        console.log(Math.floor(1.9));//向下取整
        console.log(Math.ceil(1.1));//向上取整
        console.log(Math.round(4.3));//四舍五入
        console.log(Math.abs(-33));//取绝对值
        console.log(Math.max(1, 2, 3, 4, 5));//取最大值
        console.log(Math.max.apply(null, [1, 2, 3, 4, 5]));//null表示this指针不替换
        console.log(Math.min(1, 2, 3, 4, 5));//取最小值
        console.log(Math.min.apply(null, [1, 2, 3, 4, 5]));
        console.log(Math.sqrt(100));//开平方
        console.log(Math.pow(5, 3));//幂，5的3次方
        console.log(Math.sin(90 * Math.PI / 180));//正弦，弧度=角度*π/180
        console.log(Math.cos(180 * Math.PI / 180));//余弦
        console.log(Math.tan(90 * Math.PI / 180));//正切
    </script>
</body>
</html>