Address Sprint 1 review feedback

Author: codebyra

Sprint-1/1-key-exercises/4-random.js

@@ -3,8 +3,9 @@ const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
-// num stores a random whole number between 1 and 100.
-// Math.random() generates a random decimal between 0 and 1.
+// num stores a random whole number in the interval [1, 100].
+// Math.random() generates a random decimal in the interval [0, 1).
 // Math.floor() rounds the number down to the nearest whole number.
-// Adding minimum ensures the final result is between 1 and 100.
+// Adding minimum ensures the final result is in the interval [1, 100].
+
 console.log(num);

Sprint-1/2-mandatory-errors/3.js

@@ -1,5 +1,7 @@
-const cardNumber = "4533787178994213";
-const last4Digits = cardNumber.slice(-4);
+const cardNumber = 4533787178994213;
+const last4Digits = String(cardNumber).slice(-4);
+
+console.log(last4Digits);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -11,12 +11,26 @@ console.log(`The percentage change is ${percentageChange}`);
 
 // Read the code and then answer the questions below
 
-// a) How many function calls are there in this file? Write down all the lines where a function call is made
-
-// b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
-// c) Identify all the lines that are variable reassignment statements
-
-// d) Identify all the lines that are variable declarations
-
-// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// a) There are 5 function calls.
+// Line 4: carPrice.replaceAll(",", "")
+// Line 4: Number(...)
+// Line 5: priceAfterOneYear.replaceAll(",", "")
+// Line 5: Number(...)
+// Line 10: console.log(...)
+
+// b) There is no error in the current code because it has already been fixed.
+// The original error occurred because a comma was missing between the arguments in a function call.
+// The missing programming term is "arguments".
+// Adding the missing comma fixes the syntax error.
+
+// c) Variable reassignment statements:
+// Line 4: carPrice = Number(carPrice.replaceAll(",", ""));
+// Line 5: priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+
+// d) Variable declarations:
+// Line 1: let carPrice = "10,000";
+// Line 2: let priceAfterOneYear = "8,543";
+// Line 7: const priceDifference = carPrice - priceAfterOneYear;
+// Line 8: const percentageChange = (priceDifference / carPrice) * 100;
+
+// e) The expression Number(carPrice.replaceAll(",", "")) first removes the comma from the string "10,000", producing "10000". It then converts that string into the number 10000 so it can be used in mathematical calculations.