What are undefined and undeclared variables?
By Abhijit Paul
What are undefined and undeclared variables?
Teacher SiliconIndia replied to Abhijit Paul Monday, March 22, 2010
Hi Abhijit,
Undeclared variables are those that are not declared in the program (do not exist at all),trying to read their values gives runtime error.But if undeclared variables are assigned then implicit declaration is done .
Undefined variables are those that are not assigned any value but are declared in the program.Trying to read such variables gives special value called undefined value.
