JavaScript generates a specified range of random integers

The Math.random () function can return a double value with a positive sign, which is greater than or equal to 0.0 and less than 1.0, that is, the value range is [0.0,1.0] left closed right open interval, the return value is a pseudo-random selection of the number, within that range (approximate) evenly distributed.

Our goal is to take an integer within a range, so we define a new random function.

Give this function two parameters "from" and "to" for the range of values.

Use the formula: From+math.random () * (To-from) to get the range of double shape is the number of from~to

Then cast to an int integer to

The specific code is as follows:

1 function Random (from,to) {2     var rdmnum = From+math.random () * (To-from); 3     Rdmnum = parseint (Rdmnum, ten); 4     return Rdmnum; 5 }

JavaScript generates a specified range of random integers