From 1fe269687a2bfcbc01aa062dde064a581bf70b50 Mon Sep 17 00:00:00 2001
From: TK <leandrotk100@gmail.com>
Date: Mon, 18 Dec 2023 09:05:11 -0300
Subject: [PATCH] *

---
 .../algoexpert/product-sum/product-sum.js           | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 coding_interviews/algoexpert/product-sum/product-sum.js

diff --git a/coding_interviews/algoexpert/product-sum/product-sum.js b/coding_interviews/algoexpert/product-sum/product-sum.js
new file mode 100644
index 0000000..9453306
--- /dev/null
+++ b/coding_interviews/algoexpert/product-sum/product-sum.js
@@ -0,0 +1,13 @@
+function productSum(array, product = 1) {
+  let sum = 0;
+
+  for (let num of array) {
+    if (Array.isArray(num)) {
+      sum += productSum(num, product + 1) * product;
+    } else {
+      sum += num * product;
+    }
+  }
+
+  return sum;
+}