complete 1-percetage-change.js ex.

Author: fatimarouchi

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

@@ -20,3 +20,31 @@ console.log(`The percentage change is ${percentageChange}`);
 // 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?
+
+// Answers:
+/*a) in total there are 5 function calls in the file:
+carPrice.replaceAll(",", "")
+Number(carPrice.replaceAll(",", ""))
+priceAfterOneYear.replaceAll(",", "")
+Number(priceAfterOneYear.replaceAll(",", ""))
+console.log(...) */
+
+/* b) The problem is on line 5. replaceAll is missing the comma between its
+   two inputs, so JavaScript can’t read it properly. Once I add the comma,
+   the function works normally. correct version (priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));*/
+
+/* c) The reassignment statements are:
+-carPrice = Number(carPrice.replaceAll(",", ""));
+-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," "")); */
+
+/* d) The variable declaration are:
+-let carPrice = "10,000";
+-let priceAfterOneYear = "8,543";
+-const priceDifference = carPrice - priceAfterOneYear;
+-const percentageChange = (priceDifference / carPrice) * 100; */
+
+/* e) the expression Number(carPrice.replaceAll(",",""))  removes the commas from the price string
+ and then converts it into a number. This is done so the price can be used in 
+ calculations like subtraction and division. */
+
+