en.wikipedia.org/wiki/Digit_sum

In mathematics, the digit sum of a given integer is the sum of all its digits Digit
sums are most often computed using the decimal representation of the given ...

www.sjsu.edu/faculty/watkins/Digitsum.htm

The digit sum of a number, say 152, is just the sum of the digits, 1+5+2=8. If the
sum of ... For examples, DigitSum(18)=9, DigitSum(27)=9, DigitSum(99)=9, etc.

stackoverflow.com/questions/14939953/sum-the-digits-of-a-number-python

You can do it purely in integers, and it will be the most efficient: def sum_digits(n):
s .... How to find a polynomial of which this field is a splitting field? Issue with
parallel resistors in LTSpice · I was fingerprinted in Düsseldorf on ...

math.stackexchange.com/questions/396457/hint-for-summing-digits-of-a-large-power

May 19, 2013 ... What is the sum of the digits of the number 2 1000 ? (since I'm a big .... In this
case, I'm afraid you just have to go ahead and calculate 2 1000 .

www.programmingsimplified.com/c/program/c-program-add-number-digits

Home » C programming » C programming examples » Add digits of number in c
... C program to find sum of digit of an integer which does not use modulus ...

www.geeksforgeeks.org/count-sum-of-digits-in-numbers-from-1-to-n/

Given a number x, find sum of digits in all numbers from 1 to n. Examples: Input: n
= 5 Output: Sum of digits in numbers from 1 to 5 = 15 Input: n = 12 Output: Sum ...

mathworld.wolfram.com/DigitSum.html

Digit Sum. DOWNLOAD Mathematica Notebook. A digit sum s_b(n) is a sum of
the base- b digits of n , which can be implemented in the Wolfram Language as

www.quora.com/How-do-you-find-the-sum-of-the-digits-of-2-1000

If you are using python. Its so trivial I won't even write it. If you are using C or C++,
first try to find a bound on number of digits in 2^1000 and then initialize an ...

www.accountingcoach.com/blog/sum-of-the-years-digits-depreciation

The sum of the years' digits, often referred to as SYD, is a form of accelerated
depreciation. (A more common form of accelerated depreciation is the declining ...

www.physicsforums.com/threads/formula-for-sum-of-digits-of-a-number.607385/

Any ideas on this? I googled it and got only answers inolving Excel, C++, etc... A
formula for finding the digit sum of a 2-digit number, or only a ...