How to find the sum of each digit in a positive integer?

Question

Aryan Kumar · Answer

There are many ways to find the sum of each digit in a positive integer. Here are a few methods:
Method 1: Using a loop
Initialize a variable to store the sum.Divide the integer by 10 repeatedly, and keep the remainder.Add the remainder to the sum.Repeat steps 2 and 3 until the integer is 0.Return the sum.
For example, to find the sum of the digits in the number 12345, we would do the following:
Code snippet
sum = 0
while 12345 > 0:
    sum += 12345 % 10
    12345 //= 10
This would give us a sum of 15.
Method 2: Using the sum() function
The sum() function in Python can be used to find the sum of a list of numbers. We can use this function to find the sum of the digits in a number by converting the number to a list of digits first.
For example, to find the sum of the digits in the number 12345, we would do the following:
Code snippet
sum_of_digits = sum(list(str(12345)))
This would give us a sum of 15.
Method 3: Using the reduce() function
The reduce() function in Python can be used to apply a function to all the elements of a list, and then return the result. We can use this function to find the sum of the digits in a number by using the
sum() function as the function to apply.
For example, to find the sum of the digits in the number 12345, we would do the following:
Code snippet
sum_of_digits = reduce(sum, list(str(12345)))
This would give us a sum of 15.
Which method you use to find the sum of the digits in a positive integer depends on your personal preference and the programming language you are using.

Rahul Roi · Answer

I am writing code in “Python” language.
def sum_of_digit(n):
    if(nandlt;10):
        return n;
    return n % 10 + sum_of_digit(n//10);
print(sum_of_digit(14563289));
print(sum_of_digit(-14563289));
Output:
38
-14563289

Revati S Misra · Answer

There is a following simple program to find the sum of each digit in a given positive integer,
and 
using System;
namespace HelloWorld
{
  class Program
  {
    static void Main(string[] args)
    {
    Program.SumOfDigits(765);and   
    }
   static void SumOfDigits(int num) 
    { 
        int sum = 0; 
        while (num > 0) 
        { 
            sum += num % 10; 
            num /= 10; 
        } 
        Console.WriteLine(sum); 
    }
  }
}
Output: 18

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How to find the sum of each digit in a positive integer?

Ashutosh Patel

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