JavaScript Arithmetic (Math) Random Integers and Floats
Example
var a = Math.random();
Sample value of a: 0.21322848065742162
Math.random() returns a random number between 0 (inclusive) and 1 (exclusive)
function getRandom() {
return Math.random();
}
To use Math.random() to get a number from an arbitrary range (not [0,1)) use this function to get a random number between min (inclusive) and max (exclusive): interval of [min, max)
function getRandomArbitrary(min, max) {
return Math.random() * (max - min) + min;
}
To use Math.random() to get an integer from an arbitrary range (not [0,1)) use this function to get a random number between min (inclusive) and max (exclusive): interval of [min, max)
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
To use Math.random() to get an integer from an arbitrary range (not [0,1)) use this function to get a random number between min (inclusive) and max (inclusive): interval of [min, max]
function getRandomIntInclusive(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
Functions taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
