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$ curl repovive.com/roadmaps/fundamental-algorithms/bit-manipulation/power-of-two-implementation

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$ curl repovive.com/roadmaps/fundamental-algorithms/bit-manipulation/power-of-two-implementation

Repovive

Power of Two - Implementation - Bit Manipulation | Fundamental Algorithms | Repovive

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Fundamental Algorithms8 sections · 294 units2h total

Open in Course

Power of Two - Implementation

Here is the implementation:

function isPowerOfTwo(n):
    return n > 0 and (n & (n - 1)) == 0

This runs in $O(1)$ time. No loops needed.

Alternative: n > 0 && (highestOneBit(n) == n) or check if n is in the set $\{1, 2, 4, 8, ...\}$ .