Chapter 46 — Recursion: Exercise 2 — Medium

Exercise 2 — Medium

Task:
sumArray(arr) functionini Chapter 46.5'dagi kabi emas, balki index parametri bilan (har safar yangi array yaratmasdan) qayta yozing.
Required Concepts:

• Recursion + index parameter (samaraliroq usul)
  Hint:
  function sumArray(arr, index = 0) { if (index === arr.length) return 0; return arr[index] + sumArray(arr, index + 1); }