Utility functions for random number generation

random.js

// Returns a random number between min (inclusive) and max (exclusive)
function rand(min, max) {
  return Math.random() * (max - min) + min;
}

// Returns a random integer between min (included) and max (excluded)
// Using Math.round() will give you a non-uniform distribution!
function randInt(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}