What is tha difference between "return 0" and "return 2(any other number)"?

Question

Please describe..

Answer 1

Hi Priyo,
it's new type of statement, called a return statement. When an executable program finishes running, the main() function sends a value back to the operating system that indicates whether it was run successfully or not.

This particular return statement returns the value of 0 to the operating system, which means “everything went okay!”. Non-zero numbers are typically used to indicate that something went wrong, and the program had to abort. 

Answer 2

Read this
http://www.learncpp.com/cpp-tutorial/11-structure-of-a-program/

Answer 3

Thank you @Uttam..