JavaScript: Create random numbers

With this tiny function, you get a random number in JavaScript:

function RandomNumber(upperLimit) {
   return Math.floor(Math.random()*upperLimit);
}
 
// Example of a call
var x = RandomNumber(11);
alert(x); // Number between 0 and 10

We call the function RandomNumber() with a parameter, that indicates the upper limit of the generated numbers. The function then produces numbers from 0 to a value less than the upper limit.

Therefore, if we call the function with RandomNumber(3), the function will give us one of the numbers 0, 1 or 2.