printf("%ld", sizeof(main())) in this statement if we place %f then output will be 0.000. Why the value is 0.000 ?

Question

Why we get the value of float like that

Answer 1

I would guess it's because `sizeof` operator returns a `size_t` (https://en.cppreference.com/w/c/types/size_t) and conversion from `size_t` type into `float` just won't work as smoothly as we would expect.