answered Qs with updates notes fixed syntax error to ensure code runs as expected

Author: Alex-Os-Dev-Lab

Sprint-1/3-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;
@@ -13,10 +13,33 @@ console.log(`The percentage change is ${percentageChange}`);
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
 
+// Function calls are determined by the presence of parentheses "()" after a function name.
+// Therefore in this file, there are 6 function calls:
+
 // 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 is occurring on line 5:
+// SyntaxError: missing ) after argument list. This is because there is a missing comma between the two arguments
+// (search value & replace value) in the replaceAll function.
+// To fix this problem, we can add a comma between the two arguments.
+
 // c) Identify all the lines that are variable reassignment statements
 
+// These lines include:
+// line 3: let carPrice = "10,000"; to carPrice = Number(carPrice.replaceAll(",", ""));
+// line 4: let priceAfterOneYear = "8,543"; to priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+
 // d) Identify all the lines that are variable declarations
 
+// These lines include:
+// line 3: let carPrice = "10,000";
+// line 4: let priceAfterOneYear = "8,543";
+// line 6: const priceDifference = carPrice - priceAfterOneYear;
+// line 7: const percentageChange = (priceDifference / carPrice) * 100;
+
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+
+// The purpose of this is expression is to search for remove all commas from the string value of carPrice and replace them with an empty string.
+// This converts the CarPrice value from a string to a type number, which we can now perform mathematical operations on.
+// Since the purpose of this program is to calculate the percentage change in the price of a car.
+// We need type number values to perform the necessary calculations.