Javascript如何从函数中返回值，而不是通过返回值

let globalResult;

function myFunction() {
  globalResult = 'Hello, World!';
}

myFunction();
console.log(globalResult); // 输出: Hello, World!

function myFunction(callback) {
  const result = 'Hello, World!';
  callback(result);
}

myFunction(function(result) {
  console.log(result); // 输出: Hello, World!
});

function myFunction() {
  return new Promise((resolve, reject) => {
    const result = 'Hello, World!';
    resolve(result);
  });
}

myFunction().then(result => {
  console.log(result); // 输出: Hello, World!
});

function myFunction() {
  return new Promise((resolve, reject) => {
    const result = 'Hello, World!';
    resolve(result);
  });
}

async function main() {
  const result = await myFunction();
  console.log(result); // 输出: Hello, World!
}

main();