Leetcode Add Two Numbers

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.

As we can see it’s basically like doing addition as we did in primary school!

This is the basics, we sum up the numbers each from l1 and l2. We then add the carryOver (if there exists from a previous calculation) to sum. To calculate carryOver it’s just…