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++.

Example

#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