diff --git a/README.md b/README.md
index 7893daa..ee111f5 100644
--- a/README.md
+++ b/README.md
@@ -433,7 +433,7 @@ function isPalindrome(word) {
 ```js
 var arr = [0,1,2,3,4];
 
-for (var i = 0; i < arr.length; i++) {
+for (var i = 0, l = arr.length; i < l; i++) { 
   console.log(arr[i]);
   // ...
 }