Add interpretation answers for 1-percentage-change.js

Author: lamlakamana-oss

Sprint-2/3-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;
@@ -20,3 +20,25 @@ 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?
+
+// a) I found 5 places where the code "calls" a function (runs a built-in command):
+//    Line 4: Number(...) and carPrice.replaceAll(...)
+//    Line 5: Number(...) and priceAfterOneYear.replaceAll(...)
+//    Line 10: console.log(...)
+//
+// b) The error showed up on Line 5. It said "SyntaxError: missing ) after
+//    argument list". That just means I had one too many closing brackets ( ) )
+//    at the end of that line.
+//
+// c) There are 2 lines where a variable gets a new value (reassignment):
+//    Line 4: carPrice = ...
+//    Line 5: priceAfterOneYear = ...
+//
+// d) There are 4 lines where a new variable is created (declaration):
+//    Line 1, Line 2, Line 7, and Line 8.
+//
+// e) Number(carPrice.replaceAll(",", "")) does two things, step by step:
+//    First, replaceAll(",", "") takes out all the commas from the text, so
+//    "10,000" turns into "10000".
+//    Then, Number(...) changes that text into a real number (10000), so we
+//    can do maths with it instead of treating it like a word.