Recursion: Array Sum

Write a function that finds the sum of a list. Make your function recursive.

Examples

sum_recursively([1, 2, 3, 4]) ➞ 10

sum_recursively([1, 2]) ➞ 3

sum_recursively([1]) ➞ 1

sum_recursively([]) ➞ 0

Notes

• Return 0 for an empty list.