JS Math Method Description

Math Object

The Math object, which provides a mathematical calculation of the data.

Using the properties and methods of Math, the code is as follows:

<script type= "Text/javascript" >  var mypi=math.pi;   var myabs=math.abs ( -15);  document.write (Mypi);  document.write (Myabs);</script>

Run Results :

3.14159265358979315

Note: The Math object is an intrinsic object that you can call all of its properties and methods without creating it and directly using Math as an object. This is the difference between it and the Date,string object.

Math Property


Math method


The ceil () method can be rounded up to a number: Math.ceil (x) Note: It returns the integer that is greater than or equal to x and closest to X. 

The floor () method allows a number to be rounded down. Math.floor (x) Note: returns the integer that is less than or equal to x and closest to X.

The Round () method rounds a number to the nearest integer. The Math.Round (x) method rounds a number to the nearest integer. Note: X is a mandatory value and can only be a numeric

Attention:

1. Returns the integer closest to X.

2. For 0.5, the method will be rounded up. (5.5 will be rounded to 6)

3. If x is similar to an integer on both sides, the result is close to the numeric value in the +∞ direction. (for example, 5.5 will be rounded to-5;-5.52 will be rounded to-6), such as:

The random () method returns a random number between 0 and 1 (greater than or equal to 0 but less than 1).

We get a random number between 0 and 1, with the following code:

<script type= "Text/javascript" >  document.write (Math.random ());</script>

Operation Result:

Note :Because it is a random number, the result is different for each run, but a value of 0 ~ 1.

Get a random number between 0 and 10 with the following code:

<script type= "Text/javascript" >  document.write ((Math.random ()) *10);</script>

Operation Result:

8.72153625893887

JS Math Method Description