Answer Posted / anyone

//Revision for Ahmed Ihmeid answer:
//Operator % prototype: int % int

bool isPowerOf2(int num)
{
int x;

x = num % (int(ceil(sqrt(num)));

if( x == 0)
return true; //it is a power of 2
else
return false; //it is not
}

proof:
4 % 2 = 0
16 % 4 = 0
22 % 5 != 0

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