Scope Problem is Confusing

As someone who has no previous JavaScript knowledge, the Scope problem is quite frustrating. Even though the introduction does a good job defining scope, I was not prepared to follow the code example.

Comments need to be added next to console.log to indicate that when we pass the argument within bar back to the function, var b = 2 will be ignored. I'm sure I haven't phrased that well, but it's a starting point.

Also, what purpose does the line foo(); // 4, 2, 48 serve? I understand that foo is the function's name, and the comments next to it are the values of these variables, but this statement is just sitting there. We need context. What would including foo(); at the end of this program do when we run it?

I also don't believe the IIFE section adds any relevant information to this problem. It is distracting.

Now moving on to the challenge, I don't understand why there is )(); after every closing }. I suppose that ties back to the foo(); in the example code, but I don't understand its usage.

Scope の問題の導入、コード例、IIFE のセクション、および issue で参照されている challenge から始めます。foo() を呼び出すと何が起こるのかを明確にし、console.log の関連する動作と末尾の )(); 構文を説明し、IIFE のセクションを含めるべきか検討します。JavaScript 初心者が例を追い、challenge の指示を理解できれば完了です。