minor

Author: iliakan

1-js/05-data-types/04-array/article.md

@@ -394,7 +394,7 @@ let matrix = [
   [7, 8, 9]
 ];
 
-alert( matrix[1][1] ); // the central element
+alert( matrix[1][1] ); // 5, the central element
 ```
 
 ## toString