Fixed multiply() return issue and added MDN explanation

Author: Eugenie-A

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,35 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+// Prediction: The function will not multiply the numbers.
+// Instead, it will print the sum of a and b (42) and the final console.log will ouput:
+// The result of multiplying 10 and 32 is undefined
 
+/* Original code
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+*/
+
+// =============> Error message
+// 320
+// The result of multiplying 10 and 32 is undefined
 
 // =============> write your explanation here
+// MDN Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return
+
+// The function multiply() uses console.log() to print the result but it does not return anything.
+// In JavaScript, if a function does not explicitly return a value, it returns undefined.
+// When we try to use multiplay(10, 32) inside a console.log, it returns undefined.
+// To fix this, we must use the return statement so the function gives back a value that can be used.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function multiply(a, b) {
+  return a * b;
+}
+
+// The result of multiplying 10 and 32 is 320
+console.log(`The result of multiplying 10 and 32 is ` + multiply(10, 32));