aloalgoSum of Linked List Nodes
Easy
You are given the head of a singly linked list where each node contains an integer, write a function to calculate the sum of all the values in the list.
An empty list should result in a sum of 0.
Example 1
Input
1 → 2 → 3 → 4 → null
Output
10
Explanation:
The sum of the nodes is 1 + 2 + 3 + 4 = 10.
Example 2
Input
None
Output
0
Explanation:
The input list is empty, so the sum is 0.
Example 3
Input
5 → -7 → null
Output
-2
Explanation:
The sum of the nodes is 5 + (-7) = -2.
Input
1 → 2 → 3 → 4 → null
Output
10