Update README.md

2012-02-12 10:00:11 +05:30 · 2012-02-12 10:00:11 +05:30 · 8c647c64cf
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@ -116,6 +116,7 @@ Question: What value is returned from the above statement?
 ```
 Question: What is the value of window.foo? 
 **Answer: "bar"** 
+if intially window.foo was false, undefined or zero else it will retain its value.

 ```javascript
 var foo = "Hello"; (function() { var bar = " World"; alert(foo + bar); })(); alert(foo + bar);