Basic javascript. Counting Cards challenge

JavaScript
1

Tell us what’s happening:
Can somebody please help me to solve this challenge. I don’t know what to do again after several efforts.
Please find my code below.

Your code so far


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 += 1;   break;
 case 7: case 8: case 9: count += 0;  break;
 case 10: case"J": case "Q": case "K": case "A": count -= 1; } 
  
  return count + (count > 0 ? "Bet" : "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');

Your browser information:

User Agent is: Mozilla/5.0 (Linux; Android 7.0; Infinix X5010 Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.137 Mobile Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/counting-cards/