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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 ...

Add digits of number in c | Programming Simplified


C program to add digits of a number: Here we are using modulus ... C program to find sum of digit of an integer which does not use modulus operator.

parsing - How to sum digits of an integer in java? - Stack Overflow


public static void main(String[] args) { int num = 321; int sum = 0; while (num > 0) ... Are you trying to calculate the digital root of any three digit number? If so, which part is causing you trouble? – Matt Coubrough Nov 24 '14 at 1: ...

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 ... If I want to find the sum of the digits of a number, i.e. :.

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 ...

Write ac program to find out sum of digit of given number


2. C program for sum of digits of a number. 3. C program to calculate sum of digits . #include<stdio.h>. int main(){. int num,sum=0,r;. printf("Enter a number: ");.

C Program to Compute the Sum of Digits in a given Integer ...


Nov 7, 2012 ... Then adds all the digits of a given integer, that becomes the sum of digits of integer. ... C program to accept an integer & find the sum of its digits

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 ...

What is the efficient algorithm to find the sum of the digits of a ...


One way of doing this is by actually computing the factorial. Obviously using primitive data ... What is the efficient algorithm to find the sum of the digits of a number's factorial (number can be upto 500) i.e for num=5, ans=3 (as 5! =120)?

Sum of numbers and/or digits 1-100 - Math Forum - Ask Dr. Math


How would one go about adding up all the digits 1-100? ... In general to find the sum of all the numbers from 1 to N: 1 + 2 + 3 + 4 + . . . . + N = (1 ...

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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.

parsing - sum of the digits of a number javascript - Stack Overflow


The second function uses the modulo operator to extract the last digit: 1236 % 10 ... sum=sum+theNumber%10; theNumber=Math.floor(theNumber/10); } document .writeln("Sum of digits "+sum); } find(theNumber (2, 50));.

c - Efficient way to find the sum of digits of an 8 digit number - Stack ...


Dec 9, 2013 ... Finally, if you are still interested, there is a much faster way to do this. Your task doesn't specifically require you to calculate the sums for all the ...