How does one add the digits of a large number?

Question

I have been trying to add the individual digits of a larger number for a while now, and I\'m having some trouble. I was wondering if anyone could help me.

For example, s

Answer 1

Treat it as a string, and sum the individual numbers. Slice if you need to.

sum(map(int,str(12345)))
Out[183]: 15

sum(map(int,str(12345)[1:3]))
Out[184]: 5