mandatory interpret file requirements have been met

Author: Ebrahim-Moqbel

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;
@@ -12,11 +12,26 @@ 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
+//1-carPrice.replaceAll(",", "") in line 4
+//3-Number(...) in line 4 - enumerate the first result of replaceAll
+//2-priceAfterOneYear.replaceAll("," ,"")) in line 5
+//4-Number(...) in line 5 - enumerate the second result of replaceAll
+//5-console.log(..) - line 9
 
 // 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 : a syntax error coming from the missing comma in line 5 between the arguments 
 
 // c) Identify all the lines that are variable reassignment statements
+/* const priceDifference = carPrice - priceAfterOneYear;  Line 7
+ const percentageChange = (priceDifference / carPrice) * 100;  Line 8
+*/
 
 // d) Identify all the lines that are variable declarations
+/* carPrice = Number(carPrice.replaceAll(",", ""));  Line 4
+ priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));  Line 5
+*/
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+/* the number function convert the enumerate a string to a number and the method replaceAll replace ever comma with a space
+ the purpose is to clean the value so that it can be converted to a proper number using Number().
+ */

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

@@ -12,14 +12,27 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
+//A--> There are 5 variable declarations
 
 // b) How many function calls are there?
+//A--> There are 4 function calls  in line 9 and 10
 
-// c) Using documentation, explain what the expression movieLength % 60 represents
+// c) Usings documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+//A--> % is a modulo operator that return the remainder of a multiplied number 
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+/* movieLength subtract the left over seconds from the total seconds(movieLength) to get a number that is divisible by 60
+ when dividing by 60 would convert the remaining seconds into whole minutes which ensures there is no decimal in totalMinutes
+*/
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+//A--> results present length of movie formatted as Hours:Minutes:Seconds and a better name could be fromatedMovieDuration
+
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+/*whole positive value: for the 8789 seconds the formatted duration would be fine 2:26:24 and the code would be working as expected 
+under 60 seconds: 59 seconds would assign the hours and minutes both as 0s resulting 0:0:59 instead of the normal formatted way 00:00:59 but still correct 
+zero value: the formatted duration would also be correct 0:0:0 even though it is an unusual value it still show that it can handle it 
+Negative value: for the -8789 seconds would give us an output of -2:-26:-29 which is not a valid format and doesn't make any sense
+the logic breaks where we need to give the user a message to enter a valid number
+*/

Sprint-2/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,20 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+// 2. const penceStringWithoutTrailingP = penceString.substring(0,penceString.length - 1); reassigned a new value 
+// using the method substring starting form the index 0 ="3" and ending with -1 exclusively meaning doesn't include 'p' 
+// resulting with a numeric part of the price which is '399'
+
+//3.const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+// ensure the number in a 3 digits format by adding zeros minding the consistency of the formatting.
+
+//4.const pounds = paddedPenceNumberString.substring(0,paddedPenceNumberString.length - 2);
+//extracts everything except the last two number to form the pound portion of the price
+
+//5.const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+//extracts the last two digits to form the pence portion of the price and the padEnd method ensure the number in a two digits format consistent 
+
+//6.console.log(`£${pounds}.${pence}`);
+//Combines everything into the final formatted price string. Result: £3.99
+//basically the program will take the string "399p" and print out a string of "£3.99"