Answer

data/grades.js

@@ -0,0 +1 @@
+const { grades } = require('./index.js')

index.js

@@ -15,7 +15,15 @@
         Create a new file named "grades.js" to import in the data folder
 
         Declare and initialize an array named `grades`
-
+ */
+const grades = [
+    { assignmentName: 'Assignment 01', studentName: 'Ben', score: 50 },
+    { assignmentName: 'Assignment 02', studentName: 'Jerry', score: 80 },
+    { assignmentName: 'Assignment 02', studentName: 'Ben', score: 95 },
+    { assignmentName: 'Assignment 03', studentName: 'Jerry', score: 100 },
+    { assignmentName: 'Assignment 01', studentName: 'Ben', score: 70 }
+]
+/**
         Include at least 5 object items in the array 
 
         Each object will have properties of
@@ -25,29 +33,52 @@
 
         Values are important for this lesson.
 
-            - Use 2 distinct assignment names
-            - Use 2 distinct student names
+            - Use distinct assignment names
+            - Use only 2 distinct student names
 
  */
 
- /**
+/**
 
-    Looping using your preferred looping syntax and updating a shared variable
+   Looping using your preferred looping syntax and updating a shared variable
 
-    2) Loop through the grades data using a for loop.
-        Update `gradeTotal` so it increases value for each item in the array
+   2) Loop through the grades data using a for loop.
+       Update `gradeTotal` so it increases value for each item in the array
 
- */
- const gradeTotal = 0
+*/
+
+/* let gradeTotal = 0
+for (const index in grades) {
+    // destructuring score
+    const {score } = grades[index]
+    console.log({score})
+    gradeTotal += gradeTotal
+}
+console.log({gradeTotal}) */
+/* 
+gradeTotal = 0
+grades.forEach( grade => {
+    gradeTotal += grade.score
+console.log( {gradeTotal} ) */
 
 
- /**
+
+/**
 
-    Using reduce
+   Using reduce
 
-    3) Use Array reduce to do the same total calculation logic
+   3) Use Array reduce to do the same total calculation logic
 
-        Replace `null` below with the use of `reduce`
+       Replace `null` below with the use of `reduce`
 
-  */
-  gradeTotal = null
+ */
+let gradeTotal = grades.reduce((total, grade) => {
+    //use console.log to make sure you are looking at the correct variables/properties
+    console.log(total, grade)
+    total += grade.score
+    return total
+}, 0)
+
+module.exports = {
+    grades
+}