如何在随机生成的字符旁边创建一个常量变量

<div id="random-char"></div>
<div id="constant-var"></div>

// 生成随机字符
function generateRandomChar() {
  var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  var randomChar = characters.charAt(Math.floor(Math.random() * characters.length));
  return randomChar;
}

// 创建随机字符和常量变量
function createRandomCharAndConstant() {
  var randomCharElement = document.getElementById("random-char");
  var constantVarElement = document.getElementById("constant-var");

  // 生成随机字符
  var randomChar = generateRandomChar();
  randomCharElement.innerHTML = "随机字符：" + randomChar;

  // 创建常量变量
  var constantVar = "常量值";
  constantVarElement.innerHTML = "常量变量：" + constantVar;
}

// 页面加载完成后执行创建函数
window.onload = createRandomCharAndConstant;