Total Lucky Number

function calculateLuckyTicket () {
  let numberOfTicket = "";
  let totalLuckyNumbers = 0;

  for( let i = 1; i < 1000000; i++ ){
    numberOfTicket = formatingString(i);
    if(checkLuck(numberOfTicket)){
      console.log(`Счастливое число: ${numberOfTicket}`);
      totalLuckyNumbers++;
    }
  }
  return totalLuckyNumbers;
}

function checkLuck (str) {
  let num1 = +str[0] + +str[1] + +str[2];
  let num2 = +str[3] + +str[4] + +str[5];
  if (num1 == num2){
    return true;
  } else {
    return false;
  }
}

function formatingString(num) {
  switch(`${num}`.length) {
    case 1:
      return "00000" + num;
    case 2:
      return "0000" + num;
    case 3:
      return "000" + num;
    case 4:
      return "00" + num;
    case 5:
      return "0" + num;
    case 6:
      return "" + num;
  }
}

console.log(calculateLuckyTicket());