javascript计算1/1!+1/2!+1/3!+……+1/50！

以下是JavaScript计算1/1!+1/2!+1/3!+……+1/50！的代码：

function factorial(n) {
  if (n === 0 || n === 1) {
    return 1;
  } else {
    return n * factorial(n - 1);
  }
}

function sum() {
  var result = 0;
  for (var i = 1; i <= 50; i++) {
    result += 1 / factorial(i);
  }
  return result;
}

console.log(sum()); // 输出：1.7182818284590455