fix: correct getLastDigit function to accept parameters and return the last digit of input numbers

Author: CatchingKiyoko

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

@@ -3,7 +3,7 @@
 // Predict the output of the following code:
 // =============> Write your prediction here
 // I expect each of the calls to return the last digit of "num" which is "3" its defined as a constant and we are using that const in the return statement.
-
+/*
 const num = 103;
 
 function getLastDigit() {
@@ -13,7 +13,7 @@ function getLastDigit() {
 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
 // Output:
@@ -27,6 +27,13 @@ console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // 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)}`);
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem