      
        function numberGenerator() {
      
          // Local “free” variable that ends up within the closure
      
          var num = 1;
      
          function checkNumber() { 
      
            console.log(num);
      
          }
      
          num++;
      
          return checkNumber;
      
        }
      
        var number = numberGenerator();
      
        number(); // 2

view raw numberGenerator.js hosted with ❤ by GitHub

	function numberGenerator() {
	// Local “free” variable that ends up within the closure
	var num = 1;
	function checkNumber() {
	console.log(num);
	}
	num++;
	return checkNumber;
	}

	var number = numberGenerator();
	number(); // 2