      
        var x = 10;
      
        function foo() {
      
          var y = 20; // free variable
      
          function bar() {
      
            var z = 15; // free variable
      
            return x + y + z;
      
          }
      
          return bar;
      
        }
      
        var test = foo();
      
        test(); // 45

view raw nesting2.js hosted with ❤ by GitHub

	var x = 10;

	function foo() {
	var y = 20; // free variable
	function bar() {
	var z = 15; // free variable
	return x + y + z;
	}
	return bar;
	}

	var test = foo();

	test(); // 45