What is the difference between void And int function?

Question

Many a times in C we get these two type of main function one had void as parameter one has none. Now the question is what is the difference between these two?

Answer 1

Void returns nothing, int returns something (an int)

Answer 2

void fun1(int i)
{
    return i;
}
void fun2(int i)
{
    return;
}

25 => printf("\n    %d   \n",fun1(i));
26 => printf("\n    %d   \n",fun2(i));

return.c: In function âfun1â:
return.c:6: warning: âreturnâ with a value, in function returning void
return.c: In function âmainâ:
return.c:25: error: invalid use of void expression
return.c:26: error: invalid use of void expression

===========================================
int fun4(int i)
{
    return ;
}
int main()
{
    int i = 0;
    for (i = 0; i<5; i++)
    {
        printf("\n    %d   \n",fun4(i));
    }
    return 0;
}
./a.out

    0
    1
    2
    3
    4
===============================================

Answer 3

Actually, it is the return type of function, void returns no value whereas an int returns a value called an int (integer)