Find sum of digits of a number

Here you will get the source code of C++ program to find sum of digits of a number.

Sum of digits is the sum of all digits of a positive number.

Program to find sum of digits of a number in C++

#include<iostream>

using namespace std;

int main()

{

long int rem,num,num1,sum=0;

cout<<"Enter a number : ";

cin>>num;

num1=num;

while(num ! = 0)

{

rem = num % 10;

sum = sum + rem;

num = num / 10;

}

cout<<endl<<"Sum of digits of "<<num1<< " is "<<sum;

return 0;

}

Output

Enter a number : 1234

Sum of digits of 1234 is 10