An initializable array is an that supports the read and write operations for any element initialization of entire array. This paper proposes a simple in-place algorithm to implement length $N$ containing $\ell \in O(w)$ bits entries in $N \ell +1$ on word RAM model with $w$ size, i.e., proposed requires only 1 extra bit top normal $\ell$ entries. Our all three constant worst-case time, is, it r...