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Program Discussion :: Bitwise Operator

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Write an efficient program to check whether given number is power of two or not

Answer:

#include
#include
using namespace std;
 
#define bool int

/* Function to check if x is power of 2*/
bool isPowerOfTwo (int x)
{
/* First x in the below expression is for the case when x is 0 */
return x && (!(x&(x-1)));
}

/*Driver program to test above function*/
int main()
{
isPowerOfTwo(31)?cout

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