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Hello to all my community members. I have been stuck in this function I can't find any way to resolve this problem. I have been working as a jr. developer in a reputable mobile app development firm. Can anyone suggest me app developer who can help with this problem? Thanks!

 function square(num, callback) {

  if (typeof callback !== 'function') {

    throw new TypeError(`Callback must be a function. Got: ${typeof callback}`);

  }

  // simulate async operation

  setTimeout(() => {

    if (typeof num !== 'number') {

      // if an error occurs, it is passed as the first argument to the callback

      callback(new TypeError(`Expected number but got: ${typeof num}`));

      return;

    }

    const result = num * num;

    // callback is invoked after the operation completes with the result

    callback(null, result);

  }, 100);

}