diff --git a/2441.largest-positive-integer-that-exists-with-its-negative.js b/2441.largest-positive-integer-that-exists-with-its-negative.js
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+++ b/2441.largest-positive-integer-that-exists-with-its-negative.js
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+/* URL of this problem
+ * https://leetcode.com/problems/largest-positive-integer-that-exists-with-its-negative/description/
+ *
+ * @param {number[]} nums
+ * @return {number}
+ */
+
+var findMaxK = function(nums) {
+    // Sort the input nums in a descending order
+    const Sorted = [...nums].sort((a, b) => b - a);
+
+    for (let i = 0; i < Sorted.length; i++) {
+        const Num = Sorted[i];
+
+        if (Sorted.includes(Num * -1)) {
+            return Num;
+        }
+    }
+    return -1;
+};
+
+module.exports = findMaxK;
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diff --git a/findMaxK.test.js b/findMaxK.test.js
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+++ b/findMaxK.test.js
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+const findMaxK = require("./2441.largest-positive-integer-that-exists-with-its-negative");
+
+test("Return the largest positive integer k such that -k also exists in the array", () => {
+    expect(findMaxK([-1,2,-3,3])).toBe(3);
+});
+
+test("Return -1 if there is no such a positive integer k that -k also exists in the array", () => {
+    expect(findMaxK([-10,8,6,7,-2,-3])).toBe(-1);
+});
+
+test("Return Infinity if the array contains Infinity and -Infinity", () => {
+    expect(findMaxK([Infinity, -Infinity])).toBe(Infinity);
+});
+
+test("Return 0 if the array contains only zeroes", () => {
+    expect(findMaxK([0,0])).toBe(0);
+});
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