Handy function for Log Base 2 and nearest power of two in C++

Since there is no direct way to find Logarithm Base 2 of a number in C++, the given function in C++, would come handy in several situations.

// Essential Header file - math.h

// Log2 Function

double Log2(double in)

{

return log(in)/ log(double(2));

}

Let us use the above function for calculating nearest power of two easily, as given below.

int NearestPowerOfTwo(int in)

{

return pow(2, ceil(Log2(in)));

}