Complete percentage change interpretation

Author: BrianY315

Sprint-2/3-mandatory-interpret/1-percentage-change.js

@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,27 @@ 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
+// There are 5 function calls:
+// - line 4: carPrice.replaceAll(",", "")
+// - line 5: priceAfterOneYear.replaceAll(",", "")
+// - line 4: Number(...)
+// - line 5: Number(...)
+// - line 9: console.log(...)
 
 // 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?
+// The error occurs at line 5 because the syntax is invalid: replaceAll("," "") is missing a comma between the arguments.
+// Fix it by writing replaceAll(",", "").
 
 // c) Identify all the lines that are variable reassignment statements
+// - line 4: carPrice = Number(...)
+// - line 5: priceAfterOneYear = Number(...)
 
 // d) Identify all the lines that are 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) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// It removes the commas from the string, then converts the cleaned string into a number.
+// This is necessary because the prices are stored as strings like "10,000" and "8,543", and we need to perform arithmetic on them.