Change the function to display the last digit correctly

Author: carlosyabreu

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

@@ -2,23 +2,42 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// The output will be:
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
+//
+// This happens because the function `getLastDigit` doesn’t use the argument passed to it. 
+// Instead, it always refers to the constant `num = 103`, 
+// so every time you call it, it converts 103 to a string and returns the last digit ("3").
 
-const num = 103;
+// Now run the code and compare the output to your prediction
+// =============> write the output here
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
+
+// Explain why the output is the way it is
+// =============> write your explanation here
+// The function `getLastDigit` ignores the argument being passed (like 42, 105, or 806) 
+// because it doesn’t have a parameter defined. 
+// Instead, it always uses the globally defined constant `num` (which is 103). 
+// Therefore, the function always returns the last digit of 103, which is "3".
 
-function getLastDigit() {
+// Finally, correct the code to fix the problem
+// =============> write your new code here
+function getLastDigit(num) {
   return num.toString().slice(-1);
 }
 
 console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 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
-// Explain why the output is the way it is
-// =============> write your explanation here
-// 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
+// The function was not working because it didn’t accept any parameters and 
+// was instead using the fixed global variable `num`. 
+// By adding a parameter to the function and using that instead, 
+// it now correctly calculates the last digit for any input number.
+