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Social ScienceHow can I check if a binary number is power of 2 using bit shifts or logic gates?
How can I check if a binary number is power of 2 using bit shifts or logic gates?
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A power of two will always have only one bit set. One less than a power of two is all 1s in the less significant bits. So the bitwise AND for the number and number-1 must return 0.
x & (x - 1) must be equal to 0 except if x is not 0Engineering
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