error explaination

Author: pathywang

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> get rid of const num = 103 as it is defined in global scope. the output will be always 3.
 
 const num = 103;
 
@@ -14,11 +14,27 @@ 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
+// =============> 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
+//num is always 103 inside the function (from the global variable).
+//So, every call to getLastDigit() returns "3" (the last digit of 103).
+//The arguments you pass (like 42, 105) are ignored because the function doesn't take parameters.
+
+
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> my new code:
+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)}`);
 
+// The output will be: The last digit of 42 is 2
+//                     The last digit of 105 is 5
+//                     The last digit of 806 is 6
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem