On 16 September 2011 21:06, Ian Kelly <ian.g.ke...@gmail.com> wrote: > On Fri, Sep 16, 2011 at 1:21 PM, zombie <thatiparthysreeni...@gmail.com> > wrote: >> Hi guys, >> i am writing a program to sum up the digits of a number 2**1000? >> Is there a way/formula to do it without expanding it? > > Possibly, but why worry about it? It's only around 300 digits. > > Since this sounds like homework, I won't post the one-liner I used to > do it the brute-force way, but I will note that it takes about 200 > microseconds to run on my laptop.
Ah go on, let's make a codegolf contest out of it. My entry: >>> sum(map(int,str(2**1000))) 1366 -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
