is this code valid?

Question

#include <stdio.h>
int main() {
printf(6+"hello\0world");
return 0;
}

Answer 1

This is valid code.
And it skip first 6 characters in a string. So it prints only "world".

Answer 2

Not very common the use of '\0' in the middle of a string, but it's ok in term that it runs. Valid is a contextual word.

Answer 3

Your code may be valid but if you use that number less than 6 then you will get a warning as you used \0 in the middle of the sentence.