Enhance comments for clarity and consistency across key error examples

Author: JohnRob-jnr

Sprint-2/1-key-errors/0.js

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 //  =============> write your prediction here
-//A) You are likely to encounter a syntax error because the variable `str` is being declared twice within the same scope
+//(A) You are likely to encounter a syntax error because the variable `str` is being declared twice within the same scope
 // interpret the error message and figure out why an error is occurring
 
 function capitalise(str) {

Sprint-2/1-key-errors/1.js

@@ -2,7 +2,7 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
-// An error will occur because the variable `decimalNumber` is being declared twice within the same scope
+// (A)An error will occur because the variable `decimalNumber` is being declared twice within the same scope
 
 
 // Try playing computer with the example to work out what is going on
@@ -13,8 +13,3 @@ function convertToPercentage(decimalNumber) {
 }
 
 console.log(convertToPercentage(0.5));
-
-// =============> write your explanation here
-
-// Finally, correct the code to fix the problem
-// =============> write your new code here

Sprint-2/1-key-errors/2.js

@@ -6,21 +6,16 @@
 // =============> write your prediction of the error here
 // an error will occur because the value `3` has been put in the parentheses of the function.
 
-
-function square(num) {
-    return num * num;
-}
-console.log(square(3));
-
 // =============> write the error message here
-// SyntaxError: Unexpected number
+// (A) SyntaxError: Unexpected number
 
 // =============> explain this error message here
-// An error occurs because the function parameter `3` is a literal value instead of a variable name.
+// (A)An error occurs because the function parameter `3` is a literal value instead of a variable name.
 
-// Finally, correct the code to fix the problem
 
-
-// =============> write your new code here
+function square(num) {
+    return num * num;
+}
+console.log(square(3));
 
 

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

@@ -1,14 +1,20 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+//(A) An error will occur because the function `multiply` does not return a value.
 
-function multiply(a, b) {
+/*function multiply(a, b) {
   console.log(a * b);
 }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);*/
 
 // =============> write your explanation here
+// (A) It returns `undefined`. This results in the output being "The result of multiplying 10 and 32 is undefined".
+// 
+
+function multiply(a, b) {
+  return a * b;
+}
 
-// Finally, correct the code to fix the problem
-//  =============> write your new code here
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

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

@@ -1,13 +1,21 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//(A) An error will occur because the function `sum` does not return a value. The `return` statement is followed by a semicolon, the function will return `undefined`
 
-function sum(a, b) {
+
+/*function sum(a, b) {
   return;
   a + b;
 }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);*/
 
 // =============> write your explanation here
 // 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

@@ -2,23 +2,42 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// (A) The output will be "The last digit of... is 3" for all these due the the variable `num` being set to 103 and the function `getLastDigit`
 
-const num = 103;
+
+/*const num = 103;
 
 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 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
+//(A) As predicted the output resunts last digit of the variable `num`, which is set to 103. Therefore, regardless of the input values (42, 105, 806), the function always returns '3'.
+
 // 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