Why do you need to invoke an anonymous function on the same line?

Question

I was reading some posts about closures and saw this everywhere, but there is no clear explanation how it works - everytime I was just told to use it...:

//          


        

Answer 1

There is one more property JavaScript function has. If you want to call same anonymous function recursively.

(function forInternalOnly(){

  //you can use forInternalOnly to call this anonymous function
  /// forInternalOnly can be used inside function only, like
  var result = forInternalOnly();
})();

//this will not work
forInternalOnly();// no such a method exist