Complete Sprint 2 mandatory debug

Author: codebyra

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

@@ -1,14 +1,14 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// Prediction: The function will print 320, but the final message will show "undefined".
 
 function multiply(a, b) {
-  console.log(a * b);
+  return a * b;
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// Explanation: The original function used console.log() instead of return. console.log() displays the result on the screen but does not return a value, so the function returned undefined. Changing console.log() to return fixes the problem.
 
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+// =============> write your new code here

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,14 @@
 // Predict and explain first...
-//  =============> write your prediction here
+
+// Prediction: The function will return undefined because the return statement ends before a + b is executed.
 
 function sum(a, b) {
-  return;
-  a + b;
+  return a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// Explanation: In the original code, JavaScript automatically inserts a semicolon after `return` because it is on its own line. This means the function returns undefined immediately, and `a + b` is never executed.
+
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+// =============> write your new code here

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

@@ -1,11 +1,10 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// Prediction:
+// The program will print 3 for all three lines because the function always uses the constant 'num', which is 103.
 
-const num = 103;
-
-function getLastDigit() {
+function getLastDigit(num) {
   return num.toString().slice(-1);
 }
 
@@ -14,11 +13,17 @@ console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
-// =============> write the output here
+// Output:
+// The last digit of 42 is 2
+// The last digit of 105 is 5
+// The last digit of 806 is 6
+
 // Explain why the output is the way it is
-// =============> write your explanation here
+// Explanation:
+// The original function always used the constant 'num' (103), so it always returned 3. By giving the function a parameter called 'num', it now uses the value passed into the function each time it is called.
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
 // This program should tell the user the last digit of each number.
-// Explain why getLastDigit is not working properly - correct the problem
+// Explain why getLastDigit is not working properly - correct the problem.