Function random

src/number.ts:45–63

(lower?: number, upper?: number)

 * @return {Number} Returns the random number.
 */
export function random(lower?: number, upper?: number): number {
  // random()
  if (lower === undefined) {
    return 0;
  }
  // random(lower) => random(0, lower)
  if (upper === undefined) {
    upper = lower;
    lower = 0;
  }
  let temp: number;
  // random(upper, lower)
  if (lower > upper) {
    temp = lower;
    lower = upper;
    upper = temp;
  }
  return Math.floor(lower + Math.random() * (upper - lower));
}