comments in percentage change, time format, and to pounds calculations

Author: mervereis

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

@@ -20,3 +20,23 @@ 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?
+
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+
+// a) there are 5 function calls in this file,// Line 4: replaceAll(",", "") and Number()
+// Line 5: replaceAll(",", "") and Number()
+// Line 9: console.log()
+
+// b) The error is coming from line 4 and line 5.
+//  The error occurs because the replaceAll method is being called on a string that contains a comma, which is not a valid number.
+//  To fix this problem, we can remove the commas from the strings before converting them to numbers. 
+
+// c) The variable reassignment statements are on line 4 and line 5, where carPrice and 
+// priceAfterOneYear are being reassigned to the result of the Number() function.
+
+// d) The variable declarations are on line 1 and line 2, where carPrice and priceAfterOneYear are declared and initialized with string values.
+
+// e) The expression Number(carPrice.replaceAll(",","")) is doing the following:
+// 1. This part of the expression takes the string value of carPrice (which is "10,000") and removes all comma, resulting in the string "10000".
+// 2. Number(...): This part takes the resulting string "10000" and converts it into a number (10000). 
+

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -23,3 +23,10 @@ console.log(result);
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+
+// a) There are 6 variable declarations in this program: movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, and result.
+// b) There is 1 function call in this program: console.log(result).
+// c) The movieLength % 60 calculates the remainder. This gives us the number of seconds .
+// d) The totalMinutes subtracts the extra seconds to get a clean number, then divides by 60 to find the total whole minutes.
+// e) The variable result represents the formatted string of hours, minutes, and seconds for the movie length. A better name could be formattedTime.
+// f) This code will work for positive integers, but it doesn't add a leading zero to single digits (e.g., it prints 2:5:9 instead of 02:05:09).

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -23,5 +23,18 @@ console.log(`£${pounds}.${pence}`);
 // You need to do a step-by-step breakdown of each line in this program
 // Try and describe the purpose / rationale behind each step
 
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+//1. const penceString = "399p": initializes a string variable with the value "399p"
+
+// 2 to 6.const penceStringWithoutTrailingP = penceString.substring(0,penceString.length - 1);
+//  removes the (p) at the end determined by removing the sudstring at the total length of the string -1
+
+// 8.const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//    makes sure the string is at least 3 characters long and if it is not it padds it with "0"
+
+// 9.const pounds = paddedPenceNumberString.substring( 0, paddedPenceNumberString.length - 2);
+//     gets the ammout of pounds by making a sub string that starts at the firts character (0) to the paddedPenceNumberString length -2 to exclued the last 2 characters (the p)
+
+// 10.
+// 18.console.log(`£${pounds}.${pence}`);
+//      gives the console the result using a string literal