JS Generate random number

1.

/* ----------------------------------js generate random four-digit user delete--------------------- */ function MathRand () {     var num= "";       for (var i=0;i<4;i++)     {         num+=math.floor (math.random () *10);     }      return

2.math.floor () method

The floor () method can be rounded down by a number.

For example:

<script type= "text/javascript" >document.write (math.floor (0.60) + "<br/>") document.write ( Math.floor (0.40) + "<br/>") document.write (math.floor (5) + "<br/>") document.write ( Math.floor (5.1) + "<br/>") document.write (math.floor (-5.1) + "<br/>") document.write ( Math.floor (-5.9))</script> output:0055-6-6

3.math.random () method

The----random () method returns a random number from 0 to 1.

In this example, we will get a random number between0 and 1: <script type= "text/javascript" >document.write (math.random ()) </script> output:0.6627135668146795

JS Generate random number