add answers to the questions

Author: Dipa-Sarker

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;
@@ -12,11 +12,27 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
+// There are 5 function calls. carPrice = Number(carPrice.replaceAll(",", ""));
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+// In the above 2 lines, 2 replaceAll() functions for carPrice and priceAfterOneyear and after executing them again Number() 
+// functions for the 2 variables.
+// At last, console.log() function for printing the executed value.
 
 // 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?
+// after running the code, the error is coming from this line priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));and
+// the error is  SyntaxError: missing ) after argument list. There is a comma missing in replaceAll() syntax. It should be
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));  
 
 // c) Identify all the lines that are variable reassignment statements
+// There are 2 variable reassignment statements. 
+// const priceDifference = carPrice - priceAfterOneYear;
+// const percentageChange = (priceDifference / carPrice) * 100;
 
 // d) Identify all the lines that are variable declarations
+// There are 4 variable declarations lines. 
+// let carPrice = "10,000";
+// let priceAfterOneYear = "8,543";
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// Firstly this expression replace all the commas from the variable carPrice = "10,000" to "10000" and then it converts 
+// string "10,000" to number 10000.