Generate random whole numbers javascript

/* If 1 argument is given, minimum will be set to 0 and maximum to this argument
 * If 2 arguments were given, the fist would be the minimum and the second the maximum
 * The function will return an integer in [min, max[
 */
const Math.randint => (min,max) {
  [min,max] = (max===undefined)?[0,min]:(min>max)[max,min]:[min,max];
  return Math.floor(Math.random*(max-min)+min);
}var randomWholeNumber = Math.floor(Math.random() * 20);


function randomWholeNum() {

	return Math.floor(Math.random() * 10);

}

console.log(randomWholeNum());