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Write C++ Program to Add Digits of Number using While Loop

// CPP Program to Add Digits of Number using While Loop

#include <iostream>

using namespace std;

int main()
{
	long int n, m;
	int sum = 0;

	cout << "Enter the number :--> ";
	cin >> n;

	m = n;

	while(n > 0)
	{
		int remainder = n % 10;
		sum = sum + remainder;  //sum of digits
		n = n / 10;
	}
	cout << "Sum of the digits of number " << m << " : " << sum;
	return 0;
}

Output:

Enter the number :--> 654321
Sum of the digits of number 654321 : 21