early return ในฟังก์ชัน

function gradeLabel(score) {
  if (score < 0 || score > 100) {
    return "invalid";
  }
  if (score >= 50) {
    return "pass";
  }
  return "fail";
}

console.log(gradeLabel(120));
console.log(gradeLabel(72));
console.log(gradeLabel(40));