function of return 0

Question

what is the function of return 0 in sample program?

Answer 1

Hey there mate, returning 0 means that you stopped program execution correctly ; )
Otherwise it shows some other (maybe -ve) number when it exit in incorrect way!

Answer 2

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Answer 3

Means to return nothing just do work like displaying an output
and u get a 0 value if u use it as an object