Fix getLastDigit function to accept parameters and return the correct last digit

Author: HadiVahidi20

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

@@ -2,23 +2,39 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//the function has no parameter so I am not sure if it get the 42, 105 and 806 as input or it will always use the value of num which is 103,
+// but I know it change the number to string and get the last digit using slice method, because of the -1 index that means the last character.
+// const num = 103;
 
-const num = 103;
+// function getLastDigit() {
+//   return num.toString().slice(-1);
+// }
 
-function getLastDigit() {
-  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)}`);
+// 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
+/*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
+// It happens because, as I predicted, the function always considers 103 as its argument
+
 // 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