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ElYannick24vs.c4pe

Divide by 3 without division operation

This variation allow infinite numbers to be tested.

Code
Diff
  • function dividedByThree(int $number): bool
{
    while(strlen($number) > 1) {
      $number = abs(array_sum(str_split($number)));
    }
    switch ($number) {
      case 3:        
      case 6:
      case 9:
        return true;
        break;
        
      default:
        return false;
    }
}
    • function dividedByThree(int $number): bool
    • {
    • $abs = abs($number);
    • if($abs < 10){
    • return $abs == 3 || $abs == 6 || $abs == 9;
    • while(strlen($number) > 1) {
    • $number = abs(array_sum(str_split($number)));
    • }
    • switch ($number) {
    • case 3:
    • case 6:
    • case 9:
    • return true;
    • break;
    • default:
    • return false;
    • }
    • $sum = array_sum(str_split($abs,1));
    • return dividedByThree($sum);
    • }