Counting Cards Challenge

Tell us what’s happening:
Hi below is my code but when I try running it, it doesn’t work. Can someone kindly tell me what could be the problem?

Here is my code:

var count = 0;

function cc(card) {
  // Only change code below this line
  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";
  }
  
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');

Link to the challenge:
https://www.freecodecamp.org/challenges/counting-cards

Thanks a lot. It did work.