Basic JavaScript - Counting Cards

Tell us what’s happening:
what is the function of ++ and - -

Your code so far


let 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";
  }

  return "Change Me";
  // Only change code above this line
 
}

cc(2); cc(3); cc(7); cc('K'); cc('A');

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Challenge: Basic JavaScript - Counting Cards

Link to the challenge:

Thes plus plus and minus minus operators add or subtract one from the value of the variable they are applied on.
You can google to find out more as they have different behaviours depending on their location (to the right of the variable versus to its left)