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/ answers: 1 / hits: 49058
/ 12 Years ago, fri, april 13, 2012, 12:00:00
I'm trying to create a random number generator that generates random numbers between two numbers. For instance, let's say I want to generate a random number between 4 and 10, I would want it to be able to choose from any number from 4 - 10. Here is what I tried:
var randNumMin = 4;
var randNumMax = 10;
var randInt = (Math.floor(Math.random() * (randNumMax - randNumMin + 1)) + randNumMin);
However, that didn't seem to work and generated weird random numbers that weren't between 4 and 10, and some began with 0. What would be the correct algorithm to do this?
Here is the code I'm implementing the algorithm in:
$(function() {
$('#generateRandNums').click(function() {
var numCount = document.getElementById(randNumCount).value;
var randNumMin = document.getElementById(randNumMin).value;
var randNumMax = document.getElementById(randNumMax).value;
if (numCount.match(/^[d]*$/ ) && randNumMin.match(/^[d]*$/ ) && randNumMax.match(/^[d]*$/ )) {
if (numCount == || randNumMin == || randNumMax == ) {
alert (Please fill out all forms then try again.);
} else {
if (randNumMin>randNumMax) {
alert (Please make sure your first number is smaller than the second, then try again.);
} else {
if (randNumMin<0) {
alert (Please make sure that you generate a positive number of random numbers, then try again.);
} else {
if (numCount>1) {
var randResult = (You generated + numCount + random numbers between + randNumMin + and + randNumMax + and got the numbers )
oneNumber = 0;
} else {
var randResult = (You generated a random number between + randNumMin + and + randNumMax + and got the number );
oneNumber = 1;
}
for (i=0;i<numCount;i++) {
//Get a random number between randNumMin and randNumMax
var randInt = (Math.floor(Math.random() * (randNumMax - randNumMin + 1)) + randNumMin);
if (i == numCount-1) {
if (oneNumber == 0) {
randResult = (randResult + and + randInt + .);
} else {
randResult = (randResult + randInt + .);
}
} else {
randResult = (randResult + randInt + , );
}
}
$(#randNumResults).val(randResult);
}
}
}
} else {
alert (Make sure you only enter numbers and no spaces, then try again.);
}
});
});
I also tried replacing the randInt line with this:
var randInt = Math.floor((Math.random() * ((randNumMax + 1) - randNumMin)) + randNumMin);
It still didn't work.
I'm not sure if the algorithm is wrong or I'm incorporating it wrong into the function. An answer is appreciated, thanks.
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