Sum of 2 Arrays.java

import java.io.*;
import java.util.*;

public class Main{

public static void main(String[] args) throws Exception {
    // write your code here
    Scanner scn = new Scanner(System.in);
    int n1 = scn.nextInt();
    int[] arr1 = new int[n1];
    for(int i=0; i<n1; i++)
        arr1[i] = scn.nextInt();
    
    int n2 = scn.nextInt();
    int[] arr2 = new int[n2];
    for(int i=0; i<n2; i++)
        arr2[i] = scn.nextInt();
    
    int n3 = Math.max(n1, n2) + 1;
    int[] arr3 = new int[n3];
    
    int i1 = n1 - 1, i2 = n2 - 1, i3 = n3 - 1;
    int carry = 0;
    
    while(i3 >= 0)// condition
    {
        // int sum = (n1 % 10) + (n2 % 10) + carry;
        int dig1 = (i1 >= 0) ? arr1[i1] : 0;
        int dig2 = (i2 >= 0) ? arr2[i2] : 0;
        int sum = dig1 + dig2 + carry;
        int quot = sum / 10;
        int rem = sum % 10;
        
        arr3[i3] = rem;
        carry = quot;
        i1--; i2--; i3--;
    }
    
    for(int i=0; i<arr3.length; i++)
    {
        if(i == 0 && arr3[i] == 0)
            continue;
        else
            System.out.println(arr3[i]);
    }
 }

}