text: let i = 0; let j = 0; const lines = 15; let space = ''; let sharp = '';
  while (i < lines) {
      space = '';
      sharp = '###';
      for (j = 0; j < lines - i; j++) space += ' ';
      for (j = 0; j < 2 * i + 1; j++) sharp += '#';
      i++;
      console.log(space + sharp);
  }
  