added solutions to mandatory-debug

Author: Alex Jamshidi

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,27 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+// The multiple function doesn't return anything
+// the console log that calls the multiple function will not receive anything back, this 
+// may cause an error
 
+/* Original code:
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+*/
 
 // =============> write your explanation here
+// code works, however the log gave 'undefined' instead of the multiplication output
+// this is because the multiply function doesn't return any value
 
 // Finally, correct the code to fix the problem
+
 //  =============> write your new code here
+function multiply(a, b) {
+  return (a * b);
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,24 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// the sum function won't return anything to the console.log
+// because the semicolon ends that line of logic
 
+/* Original code:
 function sum(a, b) {
   return;
   a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+*/
 
 // =============> write your explanation here
+// As before, the function returns "undefined" as nothing is returned
+
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

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

@@ -2,7 +2,10 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// the function does not pass through a parameter, therefore it will always
+// call the defined variable num as 103, giving 3 as an output each time
 
+/* Original code:
 const num = 103;
 
 function getLastDigit() {
@@ -12,13 +15,32 @@ 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
+/*
+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
+// there is no parameter for the function
+
 // 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