diff --git a/index.js b/index.js
index ff28a6f9..8cc4376c 100644
--- a/index.js
+++ b/index.js
@@ -1,22 +1,31 @@
-class NumberArray {
-  constructor(numbers) {
-    this.numbers = numbers;
-  }
+// Functional approach to calculate the sum of positive numbers in an array
+
+/**
+ * Function to calculate the sum of positive numbers in an array.
+ * @param {Array} numbers - The array of numbers.
+ * @returns {number} - The sum of positive numbers.
+ */
+function getPositiveSum(numbers) {
+  // Initialize the sum
+  let sum = 0;
 
-  getPositiveSum() {
-    let sum = 0;
-    for (let number of this.numbers) {
-      if (number > 0) {
-        sum += number;
-      }
+  // Loop through each number in the array
+  for (let number of numbers) {
+    // Check if the number is positive
+    if (number > 0) {
+      // Add the positive number to the sum
+      sum += number;
     }
-    return sum;
   }
+
+  // Return the sum of positive numbers
+  return sum;
 }
 
+// Test the function with example input
 const numbers = [2, -4, 6, -8, 10, -12];
-const numberArray = new NumberArray(numbers);
-const positiveSum = numberArray.getPositiveSum();
+const positiveSum = getPositiveSum(numbers);
 
-// Input: [2, -4, 6, -8, 10, -12]
-// Output: 18
+// Print the input and output
+console.log(`Input: [${numbers.join(', ')}]`);
+console.log(`Output: ${positiveSum}`);