fixed - missed array creation.

Author: loiane

chapter02/01-Introduction.js

@@ -4,8 +4,9 @@ var averageTempMar = 42.4;
 var averageTempApr = 52;
 var averageTempMay = 60.8;
 
+var averageTemp = [];
 averageTemp[0] = 31.9;
 averageTemp[1] = 35.3;
 averageTemp[2] = 42.4;
 averageTemp[3] = 52;
-averageTemp[4] = 60.8;
+averageTemp[4] = 60.8;