explain and fix the code

Author: vmoratti

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

@@ -2,6 +2,9 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//============Prediction========
+// I think the code output will be  "3" in al three cases as "num variable is declared outside the function and 
+// not used as a parameter for the function"
 
 const num = 103;
 
@@ -14,11 +17,30 @@ 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
+// prediction matched
 // =============> 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
+//===============Explanation===========
+// The variable is not used as a parameter of the function, and therefore
+//  is ignored when passed inside function call.
 // Finally, correct the code to fix the problem
+//
 // =============> write your new code here
+//const num = 103;
 
+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)}`);
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+// =============explanation==================
+// The variable is not used as a parameter of the function, and therefore
+//  is ignored when passed inside function call.