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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 ...

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.

Sum the digits of a number - python - Stack Overflow


If I want to find the sum of the digits of a number, i.e. : Input: 932; Output: 14 , which is (9 + 3 + 2). What is the fastest way of doing this?

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 ...

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 ...

C Program to Find Sum of Digits of a Number using Recursion ...


Feb 14, 2013 ... The following C program, using recursion, finds the sum of its digits. Here is the source code of the C program to find an element in a linked list.

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 in...

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 structures like int,long will be a bad idea. So we can use array...

factorial - Find the sum of the digits in the number 100 ...


Jul 24, 2013 ... n ! means n ( n − 1 ) … . . .3 .2 . 1. For example, 10 ! = 10 9 . . . 3 2 1 = 3628800 , and the sum of the digits in the number 10 ! is 3 + 6 + 2 + 8 + 8 ...

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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.

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: ");.

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


May 19, 2012 ... 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 ...