Sunday, 9 August 2015

What is difference between undefined and Null

Null :Null is a special value meaning “no value” . Null is a special object because “type of Null” returns “object”.
Undefined  : Undefined means that the variable has not been declared  or has not been given a value.
   Ex: //  k is not declared anywhere in code.
                  Alert(typeof i);

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