## LeetCode 002 Add Two Numbers Problem

``````# Definition for singly-linked list.
class ListNode(object):
def __init__(self, x):
self.val = x
self.next = None

class Solution(object):
#     """
#     :type l1: ListNode
#     :type l2: ListNode
#     :rtype: ListNode
#     """
#     last = 0
#     head = prev = None
#     while True:
#         if l2 is None and l1 is None and last == 0:
#             break
#         val = last
#         if l2 is not None:
#             val += l2.val
#             l2 = l2.next
#         if l1 is not None:
#             val += l1.val
#             l1 = l1.next
#         if val >= 10:
#             val = val % 10
#             last = 1
#         else:
#             last = 0
#         current = ListNode(val)
#         if prev is None:
#         else:
#             prev.next = current
#         prev = current

carry = 0
while l1 or l2:
val = carry
if l1:
val += l1.val
l1 = l1.next
if l2:
val += l2.val
l2 = l2.next
curr.next = ListNode(val % 10)
curr = curr.next
carry = int(val / 10)
if carry > 0:
curr.next = ListNode(carry)
``````

## List of all Add Two Numbers problems

Leetcode 002 Add Two Numbers problem solution in python3 with explanation. This is the best place to expand your knowledge and get prepared for your next interview.

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