Any difference between First Class Function and High Order Function

Question

I\'m wondering whether/what difference between First Class Function and High Order Function.

I read through those two wiki pages and they looks rather similar. If they

Answer 1

First Class functions can:

• Be stored in variables
• Be returned from a function.
• Be passed as arguments into another function.

High Order Function is a function that returns another function.

For example:

function highOrderFunc() {
  return function () {
    alert('hello');
  };
}