About Data Processing

var num = 10; literal definition (custom message attributes undefined)

var num1 = new Number (10); presentation objects in the form of

 

infinity infinity 

-infinity equivalent to negative infinity

 

Arithmetic Math Object

 Execution: Common arithmetic algorithm

 

Common method 

  toFixed () to retain the specified number of decimal rounding results

  toString () into the corresponding digital binary string and into

Math properties

var PI = Math.PI uppercase identification constant pi

  Common method

 Math.abs () absolute value

    var num = -1; conosle.log (Math.abs (num))

 Math.ceil () rounding up 

 Math.floor () rounded down the parseInt () instead of

 Math.max () given maximum value

 Math.min () given minimum value

    

 Math.pow (x, y) returns the power of y x

   var x = 2, y = 4; var z = Math.pow (x, y); console.log (z);

Math.random () returns the random number to the numerical range

    (Max-min) * math.random () + min random number generation interval does not include the maximum value

          Including the maximum range

     (max-min+1)*math.random()+min

     max.ceil((max-min)*math.random()+min

Math.round () rounded integer value

Math.sqrt () square root 

   var f=16; conosle.log(Math.sqrt(f));