Why we are write "return 0" in end of th program?

Answer 1

By standard an integer should be returned to main function to show successful compilation...(the program worked fine...)
return is the exit status for main

On most OS 0 means success...i.e.
0 is sent to show no error...
while other than 0 means error...

well it is not compulsory....now
just a convention...

Answer 2

its simple question...

getch()
getche()
printf()
clrscr()
these all function are created by DR in C
and in CPP
so who decided it return something or not

the simple ans is created decided the function return the value or not..

now back to your question
in any language.

function is basically created to return something......

so it depends upon us what we want to return which value for it

you can return any value
like
0,1,......10
any internet number
any floating point number
or anything you desired
but there are some rule...
and return command has own limitations
you must know

this question asked so many time....
you get more and if my ans not satisfied you.

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