Javascript循环返回字符串x次

function repeatString(str, x) {
  let result = "";
  for (let i = 0; i < x; i++) {
    result += str;
  }
  return result;
}

console.log(repeatString("Hello", 3)); // 输出 "HelloHelloHello"

function repeatString(str, x) {
  let result = "";
  while (x > 0) {
    result += str;
    x--;
  }
  return result;
}

console.log(repeatString("Hello", 3)); // 输出 "HelloHelloHello"