JS基础语法----Math对象

   console.log(Math.PI);
   console.log(Math.E);

   console.log( Math.abs(‘-1‘));//1

   console.log( Math.abs(-2));//2
   console.log(Math.abs(null));//---------0  重点
   console.log(Math.abs("string"));//NaN

   console.log(Math.ceil(12.3));
   console.log(Math.ceil(12.9));
   console.log(Math.ceil(12.09));
   console.log(Math.ceil(12.03));
   console.log(Math.ceil(12.92));

   console.log(Math.floor(12.3));
   console.log(Math.floor(12.9));
   console.log(Math.floor(12.09));
   console.log(Math.floor(12.03));
   console.log(Math.floor(12.92));

   console.log(Math.fround(2));
   console.log(Math.fround(2.1));
   console.log(Math.fround(2.9));

    //找一坨数字中的最大值
   console.log(Math.max(10,1,9,100,200,45,78));
   console.log(Math.min(10,1,9,100,200,45,78));
   
   console.log(Math.pow(2,4));
   console.log(Math.sqrt(16));

    console.log(parseInt(Math.random()*5)+1);
    console.log(parseInt(Math.random()*100)+1);