Is return and return 0 are same

Answer 1

No

https://code.sololearn.com/cU3NkX2wfIb4/?ref=app

Answer 2

tq

Answer 3

in main function return 0 or exit(0) are same but if you write exit(0) in different function then you program will exit from that position. returning different values like return 1 or return -1 means that program is returning error . ... But destructors are called if return 0 is used.
https://cboard.cprogramming.com/cplusplus-programming/170281-return-0;-return-1;.html