Change function replaceAll arguments adding commas to separate its parameters and use Number function to convert into a Number

Author: carlosyabreu

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 +13,40 @@ 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 and their line numbers
+// line 3 - carPrice.replaceAll(",", "") - Callls replaceAll() on the string to remove commas
+// line 3 - Number(...) - Converts the resulting string to a number
+// line 4 - priceAfterOneYear.replaceAll("," "") - Syntax error here - Intendend to replaceAll() but missing a comma between arguments
+// line 8 - console.log(...) - Prints to console 
+// // Total intended function calls: 5
+
 // 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?
 
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+// Error: SyntaxError: missiong ) after argument list
+// Reason:
+// There's a missing comma between the arguments of replaceAll.
+// The correct syntax should be:
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+
 // c) Identify all the lines that are variable reassignment statements
 
+// These are the lines where variables that were already declared are assigned a new value:
+// carPrice = Number(carPrice.replaceAll(",", "");
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+// Reassignments: Lines 3 and 4
+
 // d) Identify all the lines that are variable declarations
 
+// These are the lines where variables are first introduced:
+// let carPrice = "10,000";
+// let priceAfterOneYear = "8,543";
+// const priceDifference = carPrice - priceAfterOneYear;
+// 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 all commas from the string "10,000", then it becomes "10000"
+// Number("10000") - Converts the string "10000" into a numeric value 10000.
+// Purpose: To convert a formatted currency string (with commas) into a number that can be used for mathematical calculations.
+