View difference between Paste ID: VGa02dRw and kQkdLJ9y

 var test;
 
 // Synchronous
 test = 'before';
 
 // Asynchronous
 var myFunction = function (cb) {
     // Let's pretend this is network or filesystem access...
     setTimeout(function () {
         cb('after')
     }, 1000);
 }
 myFunction(function(result) {
    test = result;
 });
-
+
-console.log(test); // Outputs 'before', because myFunction has not yet called the callback
+// This executes out of order, because setTimeout is async
-setTimeout(function () {
+setTimeout(function () {
-    console.log(test); // Outputs 'after', because myFunction has eventually called the callback
+    console.log(test);
-}, 2000);
+}, 2000);
 console.log(test);
 
 // Output:
 // > before
 // > after