Number数字常用方法-526互联

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <script>
            //Number toFix()
            
            var price = 123.456789
            
            console.log(price.toFixed(3))
            var sum = price.toFixed(2)-0+100
            console.log(sum.toFixed(2))
            
            
            //Math 对象
            
            //random //0-1 随机整数
            console.log(Math.random())
            
            //round 四舍五入取整
            console.log(Math.round(4.23))
            
            //ceil向上取整 floor 向下取整 
            console.log(Math.ceil(4.23))
            
            //abs 绝对值
            console.log(Math.abs(-4.23))
            
            //sqrt 平方根
            console.log(Math.sqrt(77))
            
            //pow 次幂
            console.log(Math.pow(2,5))
            
            //max 最大值
            console.log(Math.max(4,5,8))
            
            //min 最小值
            console.log(Math.min(4,3,2))
            
            //PI
            console.log(Math.PI)
        </script>
    </body>
</html>