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## Digit sum - Wikipedia

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 ...

## Digit Sum Arithmetic - San Jose State University

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.

## Add digits of number in c | Programming Simplified

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 ...

## elementary number theory - HINT for summing digits of a large ...

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 .

## Sum the digits of a number - python - Stack Overflow

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 = 0 while n: s += n % 10 n //= 10 return s. or with divmod :

## Compute sum of digits in all numbers from 1 to n - GeeksforGeeks

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 ...

## Formula for sum of digits of a number | Physics Forums - The ...

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 ...

## How do I calculate depreciation using the sum of the years' digits ...

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 ...

## How to find the sum of the digits of 2^1000 - Quora

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 ...

## Digit Sum -- from Wolfram MathWorld

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