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

class Solution {
    public int differenceOfSum(int[] nums) {
        int sum1=0,sum2=0,c=0,d=0;
        for(int i=0;i<nums.length;i++){
            sum1+=nums[i];
            if(nums[i]<=9){
                sum2+=nums[i];
            }
            if(nums[i]>9){
                c=nums[i];
                while(c>=1){
                    d=c%10;
                    sum2+=d;
                    c=c/10;
                }
            }
        }
        
        return sum1-sum2;
    }
}