(function() {

  var myNumber = 4;             /* number variable declaration */

  var myFunction = function(){  /* function variable declaration */

    console.log('formidable!'); 

  };

  var myObject = {              /* object variable declaration */

    anotherNumber : 1001, 

    anotherFunc : function(){ console.log('formidable!'); }

  };

  myOtherFunction = function(){

    console.log('haha. got ya!');

  };

})();

myOtherFunction();         // reachable, hence works: see in the console

window.myOtherFunction();  // yes works, myOtherFunction is then in the global scope

myFunction();              // unreachable, will throw an error, see in the console

​