how to card count code example

Example: counting cards

var count = 0;

function cc(card) {
switch(card){
  case 2:
  case 3:
  case 4:
  case 5:
  case 6:
  count++;
  break;
  case 10:
  case 'J':
  case 'Q':
  case 'K':
  case 'A':
  count--;
  break;
}
  if(count > 0){
  return count + " Bet";
  }else{
  return count + " Hold"
  }
}

cc(2); cc(3); cc(7); cc('K'); cc('A');
console.log(cc(2)); //Check your code with console log.