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Sum of digits program in C++

We can write the sum of digits program in C++ language by the help of loop and mathematical operation only.

Sum of digits algorithm

To get sum of each digit by C++ program, use the following algorithm:

Step 1: Get number by user
Step 2: Get the modulus/remainder of the number
Step 3: sum the remainder of the number
Step 4: Divide the number by 10
Step 5: Repeat the step 2 while number is greater than 0.

Let's see the sum of digits program in C++.

#include <iostream>
using namespace std;
int main()
{
int n,sum=0,m;  
cout<<"Enter a number: ";  
cin>>n;  
while(n>0)  
{  
m=n%10;  
sum=sum+m;  
n=n/10;  
}  
cout<<"Sum is= "<<sum<<endl;  
return 0;
}

Output:

Enter a number: 23  
 Sum is= 5

Enter a number: 624       
Sum is= 12

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