2535. Difference Between Element Sum and Digit Sum of an Array

class Solution {
public:
    int digit(int n){
        int sum=0;
        while(n){
            sum+=n%10;
            n=n/10;
        }
        return sum;
    }

    int differenceOfSum(vector<int>& nums) {
        int sum=0, digitsSum=0;
        for(int i=0; i<nums.size(); i++){
            sum+=nums[i];
            digitsSum += digit(nums[i]);
        }
        return sum-digitsSum;
    }
};