diff --git a/1588.sum-of-all-odd-length-subarrays.js b/1588.sum-of-all-odd-length-subarrays.js
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+++ b/1588.sum-of-all-odd-length-subarrays.js
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+/* URL of this problem
+ * https://leetcode.com/problems/sum-of-all-odd-length-subarrays/description/
+ *
+ * @param {number[]} arr
+ * @return {number}
+ */
+
+var sumOddLengthSubarrays = function(arr) {
+    let SubarraySum = 0;
+
+    for (let i = 1; i <= arr.length; i += 2) {
+        for (let j = 0; i + j <= arr.length; j++) {
+            const Subarray = arr.slice(j, i + j);
+            const Sum = Subarray.reduce((sum, curr) => sum + curr);
+
+            SubarraySum += Sum;
+        }
+    }
+
+    return SubarraySum;
+}
+
+module.exports = sumOddLengthSubarrays;
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diff --git a/sumOddLengthSubarrays.test.js b/sumOddLengthSubarrays.test.js
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+++ b/sumOddLengthSubarrays.test.js
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+const sumOddLengthSubarrays = require("./1588.sum-of-all-odd-length-subarrays");
+
+test("Return the sum of all the odd-length subarrays in the input arr", () => {
+    expect(sumOddLengthSubarrays([1,4,2,5,3])).toBe(58);
+});
+
+test("Return 0 if the input arr is empty", () => {
+    expect(sumOddLengthSubarrays([])).toBe(0);
+});
+
+test("Return Infinity if the input arr includes Infinity", () => {
+    expect(sumOddLengthSubarrays([1,4,2,5,3,Infinity])).toBe(Infinity);
+});
+
+test("Return -Infinity if the input arr includes -Infinity", () => {
+    expect(sumOddLengthSubarrays([1,4,2,5,3,-Infinity])).toBe(-Infinity);
+});
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