adding answers and explanations and fixing the error to the given code

Author: AkliluMihtsun

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

@@ -2,7 +2,8 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -20,3 +21,21 @@ 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?
+
+// Answer
+
+// a) In this file we can say we have 5 function calls (2 function calls & 3 method calls to be specific) and they are in line 4, 5 and 10
+
+// b) When we run the code the error is generating from line 5 and the reason is that when we pass more than 1 argument
+// in a method we need to separate them with comma, but in line 5 there is no comma to separate the arguments
+// we can fix it by adding a comma to separate the arguments
+
+// c) Lines 4 and 5 are reassignment statements
+
+// d) Lines 1, 2, 7 and 8 are variable declarations
+
+// e) The expression Number(carPrice.replaceAll(",",""))
+// 1. carPrice.replaceAll(",","") this method is removing the "," from the String variable carPrice by replacing the "," with empty String which is ""
+// all left then is just the String digits without ","
+// 2. Number("String digit without comma") and this function converts the String digit to number digit
+// and finally  Number(carPrice.replaceAll(",","")) expression gives us number