Xn0vv3r - 1 year ago 83

C# Question

What's the fastest and easiest to read implementation of calculating the sum of digits?

I.e. Given the number: 17463 = 1 + 7 + 4 + 6 + 3 = 21

Answer Source

You could do it arithmetically, without using a string:

```
sum = 0;
while (n != 0) {
sum += n % 10;
n /= 10;
}
```