Calling function in PrintNQueen

In section 8 lecture 1 PrintNQueen i am unable to understand why we are not updating String.As we have appended the all the true cases in string which we are updating false in backtracking…Also in lecture sir has said every time we call function PrintNQueen we have not to remove the appended string what does it means?

@Mravinash

in lecture sir has said every time we call function PrintNQueen we have not to remove the appended string what does it means?

Yes, you are right. In fact, we can make it empty but it still won’t matter as we would have to append the same data again.

regarding your other doubt can u elaborate?