updated c, d and e

Author: RaeesStevens

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

@@ -22,13 +22,17 @@ console.log(`The percentage change is ${percentageChange}`);
 // The error is coming from line 5. There is a separator missing from the function call. Insert a comma to fix the problem.
 
 // c) Identify all the lines that are variable reassignment statements
-// carPrice = Number(carPrice.replaceAll(",", ""));
-// priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+// Line 4 carPrice = Number(carPrice.replaceAll(",", ""));
+// Line 5 priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
 
 // d) Identify all the lines that are variable declarations
-// let carPrice = "10,000";
-// let priceAfterOneYear = "8,543";
-// const priceDifference = carPrice - priceAfterOneYear;
-// const percentageChange = (priceDifference / carPrice) * 100;
+// 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?
+// carPrice.replaceAll(",", "") removes every comma from the string, turning "10,000" into "10000".
+// Number(...) then converts that string into the number 10000.
+// The purpose is to turn a formatted price string into a real number so it can be used in calculations.
+// Without the commas removed, Number("10,000") would return NaN.