Simple analysis of JavaScript closures when encapsulating functions_javascript skills

wbkt2t recently discovered a new term: closure. (I am lagging behind, so I have to study hard). After looking at the principles and examples on Baidu and Google, I also understood the power of closures. JQuery has also promoted closures, and some personally developed frameworks on the Internet have used closures. After knowing the principle and use of closures, I tried it a little, with doubts: What are the benefits of using closures? What are the consequences of not using it? I wrote the following code, and I hope you can give me some answers
Use closures:
Example 1

Copy code The code is as follows:

var $Darren;
(function(){
var Obj={version:"1.0",author:"Darren"};
Obj. Add=function(arg1,arg2){
return (arg1 arg2);
}
Obj.Multi=function(arg1,arg2){
return (arg1*arg2);
}
$Darren=Obj;
})(); //Anonymous function and make it execute immediately
alert($Darren.Add(6,2)); //Result 8
alert ($Darren.Multi(3,5)); //Result 15

Does not use closure code:
Example 2

Copy code The code is as follows:

var $Darren2={version:"1.0",author:"Darren"};
$Darren2.Add= function(arg1,arg2){
return (arg1 arg2);
}
$Darren2.Multi=function(arg1,arg2){
return (arg1*arg2);
}
alert($Darren2.Add(6,2)); //Result 8
alert($Darren2.Multi(3,5)); //Result 15

Mine The understanding is:
. Using closures can prevent naming conflicts. For example, in Example 1, if the $Darren variable conflicts, only two places need to be changed, while in Example 2, if the $Darren2 variable conflicts, multiple changes are needed. (Here are 3 places)
. After using a closure, even if the anonymous function is executed, you can still use its internal functions.

I also have a question:
Why does everyone recommend the writing method of Example 1? Which one is better, Example 1 or Example 2, and why? The same functions can be achieved.

I hope everyone can give me some advice, is this the right understanding?
Anything else to add?
Thank you everyone~~~