arrays - About pop() and push() in Javascript -

I'm actually beginning to get started in JavaScript, and as much as I can read, I can read as much.

But when it comes to pop () and push () , then I get some strange results which I am thinking.

Here is the code:

  var arr = []; Arr.push (2,3); Console.log (arrive); Console.log (arr.pop ()); Console.log (arrive);   
 The result is:  
 
 [2, an unspecified one ?? 1]  
 3  
 [2]   
 It should not be:  
 
 [2, 3 ]  
 3  
 [2]    
 
 < P> This is due to the asynchronous evaluation of  console.log  on your browser. When the results of the first  console.log  are displayed, the item has already gone due to  pop .  
 For precise results, call  toString () :  
  var arr = []; Arr.push (2,3); Console.log (arr.toString ()); // 2.3 - Expected console.log (arr.pop ()); Console.log (arrive);