title: Any efficient way to calculate the sum of harmonic series upto nth term? 1 + 1/2 + 1/3 + --- + 1/n =?
body: <p>Is there any formula for this series "1 + 1/2 + 1/3 + --- + 1/n = ?" I think it is a harmonic number in a form of sum(1/k) for k = 1 to n.</p>