diff --git a/2-js-basics/4-arrays-loops/array.js b/2-js-basics/4-arrays-loops/array.js
index 25c5c0316..a73554b48 100644
--- a/2-js-basics/4-arrays-loops/array.js
+++ b/2-js-basics/4-arrays-loops/array.js
@@ -45,12 +45,18 @@ return min;
 
 function calculateSum(){
     let a = 0;
+    let i = 0;
 
     for (const num of numbers){
         if (num === numbers[0]){
             a += num;
+            i++;
+            console.log(`step ${i}: ${a}`);
+
         }else {
             a += a + num;
+            i++;
+            console.log(`step ${i}: ${a}`);
         }
     }