Details on how to use JS to generate random numbers and how to use js random numbers

Details on how to use JS to generate random numbers and how to use js random numbers

Usage of random numbers generated by JS

<script>  function GetRandomNum(Min,Max){  var Range = Max - Min;  var Rand = Math.random();  return(Min + Math.round(Rand * Range));  }  var num = GetRandomNum(1,10);  alert(num);  </script>var chars = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];function generateMixed(n) {   var res = "";   for(var i = 0; i < n ; i ++) {     var id = Math.ceil(Math.random()*35);     res += chars[id];   }   return res;}

1. Math. random (); the result is a random number (including 0, not 1) between 0 and 1)

2. Math. floor (num); The num parameter is a numerical value, and the function result is an integer part of num.

3. Math. round (num); The num parameter is a numerical value, and the function result is an integer rounded to num.

Math: A mathematical object that provides mathematical computation of data.
Math. random (); returns a random number between 0 and 1 (including 0, excluding 1.

Math. ceil (n); returns the smallest integer greater than or equal to n.
When Math. ceil (Math. random () * 10) is used, a random integer ranging from 1 to 10 is obtained. The probability of a random integer from 0 is very small.

Math. round (n); returns the integer value after n rounding.
Use Math. round (Math. random (); a random integer ranging from 0 to 1 can be obtained evenly.
When Math. round (Math. random () * 10) is used, a random integer ranging from 0 to 10 can be obtained in a balanced manner. The probability of obtaining the minimum value 0 and the maximum value 10 is less than half.

Math. floor (n); returns the largest integer less than or equal to n.
When Math. floor (Math. random () * 10) is used, a random integer ranging from 0 to 9 can be obtained evenly.

The above is a detailed explanation of how to use the JavaScript code to generate random numbers for everyone. I hope you can provide more support ~