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Digit sum - Wikipedia


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


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 ...


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


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


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 ...


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


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


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