Documentation for 0fea073413

d4/d38/power__of__two_8cpp.html

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 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock"><p >Implementation to check whether a number is a power of 2 or not. </p>
 <p >This algorithm uses bit manipulation to check if a number is a power of 2 or not.</p>
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 Algorithm</h3>
 <p >Let the input number be n, then the bitwise and between n and n-1 will let us know whether the number is power of 2 or not</p>
 <p >For Example, If N= 32 then N-1 is 31, if we perform bitwise and of these two numbers then the result will be zero, which indicates that it is the power of 2 If N=23 then N-1 is 22, if we perform bitwise and of these two numbers then the result will not be zero , which indicates that it is not the power of 2 </p><dl class="section note"><dt>Note</dt><dd>This implementation is better than naive recursive or iterative approach.</dd></dl>

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