From bdac702888a4f07fa102a9e9288870ee692d45c8 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 20:35:28 +0100 Subject: [PATCH 01/12] Add explanation for count increment operation Added a comment explaining the increment operation on the count variable. --- Sprint-2/1-key-exercises/1-count.js | 1 + 1 file changed, 1 insertion(+) diff --git a/Sprint-2/1-key-exercises/1-count.js b/Sprint-2/1-key-exercises/1-count.js index 117bcb2b6..64993e223 100644 --- a/Sprint-2/1-key-exercises/1-count.js +++ b/Sprint-2/1-key-exercises/1-count.js @@ -4,3 +4,4 @@ count = count + 1; // Line 1 is a variable declaration, creating the count variable with an initial value of 0 // Describe what line 3 is doing, in particular focus on what = is doing +//adds 1 to the value of count and then = operator stores that value in count variable From 2ce1dda2fb1431c32dd01dde3329678ce8fd3044 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 20:38:02 +0100 Subject: [PATCH 02/12] Store initials from first, middle, and last names --- Sprint-2/1-key-exercises/2-initials.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js index 964c9563c..e5e317ec7 100644 --- a/Sprint-2/1-key-exercises/2-initials.js +++ b/Sprint-2/1-key-exercises/2-initials.js @@ -5,6 +5,6 @@ const lastName = "Johnson"; // Declare a variable called initials that stores the first character of each string. // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution. -const initials = ``; +const initials = firstName[0] + middleName[0] + lastName[0]; // https://www.google.com/search?q=get+first+character+of+string+mdn From 4c43955269997dfa1010376a09038a3cbdbf52db Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 20:48:15 +0100 Subject: [PATCH 03/12] Implement dir and ext variable assignments --- Sprint-2/1-key-exercises/3-paths.js | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js index ab90ebb28..cca4eeecc 100644 --- a/Sprint-2/1-key-exercises/3-paths.js +++ b/Sprint-2/1-key-exercises/3-paths.js @@ -17,7 +17,7 @@ console.log(`The base part of ${filePath} is ${base}`); // Create a variable to store the dir part of the filePath variable // Create a variable to store the ext part of the variable -const dir = ; -const ext = ; +const dir = filePath.slice(0, lastSlashIndex); +const ext = filePath.slice(filePath.lastIndexOf(".") + 1); -// https://www.google.com/search?q=slice+mdn \ No newline at end of file +// https://www.google.com/search?q=slice+mdn From 71bd055714e94613755d5f70be2d2de78a5ee434 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 20:54:15 +0100 Subject: [PATCH 04/12] Clarify random number generation in 4-random.js Added comments explaining the random number generation logic. --- Sprint-2/1-key-exercises/4-random.js | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js index 292f83aab..912943c22 100644 --- a/Sprint-2/1-key-exercises/4-random.js +++ b/Sprint-2/1-key-exercises/4-random.js @@ -7,3 +7,9 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum; // Try breaking down the expression and using documentation to explain what it means // It will help to think about the order in which expressions are evaluated // Try logging the value of num and running the program several times to build an idea of what the program is doing + +//num represents a random whole number between 1 and 100 +// Math.random() produces a random decimal from 0 up to 1 . +// Math.random() * 100 produces a decimal from 0 up to 100. +// Math.floor() rounds the number down to a whole number, giving 0–99. +// +minimum (+1) shifts that range to 1–100. From c68a1d24c263838432e08939a2de905a0dfc5c77 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:01:04 +0100 Subject: [PATCH 05/12] Comment out instructions in 0.js --- Sprint-2/2-mandatory-errors/0.js | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js index cf6c5039f..044add7ac 100644 --- a/Sprint-2/2-mandatory-errors/0.js +++ b/Sprint-2/2-mandatory-errors/0.js @@ -1,2 +1,2 @@ -This is just an instruction for the first activity - but it is just for human consumption -We don't want the computer to run these 2 lines - how can we solve this problem? \ No newline at end of file +// This is just an instruction for the first activity - but it is just for human consumption +// We don't want the computer to run these 2 lines - how can we solve this problem? From 076f588c965875d98dc63c05159df788c9fc6d26 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:01:38 +0100 Subject: [PATCH 06/12] Change const to let for age variable --- Sprint-2/2-mandatory-errors/1.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js index 7a43cbea7..031839b47 100644 --- a/Sprint-2/2-mandatory-errors/1.js +++ b/Sprint-2/2-mandatory-errors/1.js @@ -1,4 +1,4 @@ // trying to create an age variable and then reassign the value by 1 -const age = 33; +let age = 33; age = age + 1; From 16a83e697c8ddd5b10fa9cc67ff7ec1783a8828d Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:03:34 +0100 Subject: [PATCH 07/12] Fix variable declaration order for logging --- Sprint-2/2-mandatory-errors/2.js | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Sprint-2/2-mandatory-errors/2.js b/Sprint-2/2-mandatory-errors/2.js index e09b89831..c46e98083 100644 --- a/Sprint-2/2-mandatory-errors/2.js +++ b/Sprint-2/2-mandatory-errors/2.js @@ -1,5 +1,5 @@ // Currently trying to print the string "I was born in Bolton" but it isn't working... // what's the error ? - -console.log(`I was born in ${cityOfBirth}`); const cityOfBirth = "Bolton"; +console.log(`I was born in ${cityOfBirth}`); + From 0ae360a095d5529a45ebdcf28fc1b011e3e35667 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:07:55 +0100 Subject: [PATCH 08/12] Fix last4Digits assignment to use string conversion Convert cardNumber to string before slicing to get last 4 digits. --- Sprint-2/2-mandatory-errors/3.js | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js index ec101884d..fa03c79fb 100644 --- a/Sprint-2/2-mandatory-errors/3.js +++ b/Sprint-2/2-mandatory-errors/3.js @@ -1,5 +1,5 @@ const cardNumber = 4533787178994213; -const last4Digits = cardNumber.slice(-4); +const last4Digits = String(cardNumber).slice(-4); // The last4Digits variable should store the last 4 digits of cardNumber // However, the code isn't working @@ -7,3 +7,5 @@ const last4Digits = cardNumber.slice(-4); // Then run the code and see what error it gives. // Consider: Why does it give this error? Is this what I predicted? If not, what's different? // Then try updating the expression last4Digits is assigned to, in order to get the correct value + +// The .slice() method works on strings, but numbers don't have a .slice() method From c2161ed50d679dcfd2dd44db3759dd93993d86b7 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:19:17 +0100 Subject: [PATCH 09/12] Rename variables for clock time format --- Sprint-2/2-mandatory-errors/4.js | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Sprint-2/2-mandatory-errors/4.js b/Sprint-2/2-mandatory-errors/4.js index 5f86c730b..b56c133ec 100644 --- a/Sprint-2/2-mandatory-errors/4.js +++ b/Sprint-2/2-mandatory-errors/4.js @@ -1,2 +1,2 @@ -const 12HourClockTime = "8:53pm"; -const 24hourClockTime = "20:53"; +const clockTime12Hour = "8:53pm"; +const clockTime24Hour = "20:53"; From 256c58a6be6426b74f223e4f9f288ccc5533804a Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:27:47 +0100 Subject: [PATCH 10/12] Correct variable declarations and function calls Fixed variable reassignment issues and corrected function call. --- .../3-mandatory-interpret/1-percentage-change.js | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js index e24ecb8e1..1ad343717 100644 --- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js +++ b/Sprint-2/3-mandatory-interpret/1-percentage-change.js @@ -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 +// There are 5 function calls in the code: // 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 original code has an error here: +//line 5 : It should be: replaceAll(",", "") +// There is also another problem: carPrice and priceAfterOneYear +// are declared with const, so they cannot be reassigned. +// They should be declared with let if we want to reassign them. // c) Identify all the lines that are variable reassignment statements +// carPrice = Number(carPrice.replaceAll(",", "")); +// priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", "")); // d) Identify all the lines that are variable declarations +// const carPrice = "10,000"; +// const 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? +// First, replaceAll(",", "") removes the comma from "10,000", producing the string "10000". +// Then Number() converts the string "10000" into the number 10000. +// This is necessary so that we can perform mathematical calculations with the price. From d899f9a64f7be473c8f462e46e7b1fadee93c4e8 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:34:11 +0100 Subject: [PATCH 11/12] Refine comments for clarity in time format logic Updated comments to clarify variable declarations, function calls, and expressions in the time format calculation. --- Sprint-2/3-mandatory-interpret/2-time-format.js | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js index 47d239558..506acd230 100644 --- a/Sprint-2/3-mandatory-interpret/2-time-format.js +++ b/Sprint-2/3-mandatory-interpret/2-time-format.js @@ -12,14 +12,21 @@ 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? - +// There are 7 variable declarations: movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, result // b) How many function calls are there? - +// There is 1 function call: console.log(result) // c) Using documentation, explain what the expression movieLength % 60 represents // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators +// The % operator is the remainder operator. movieLength % 60 finds the remainder after dividing movieLength by 60. // d) Interpret line 4, what does the expression assigned to totalMinutes mean? - +// Calculate the total number of complete minutes. +// First, subtract the remaining seconds from the movie length, +// leaving a number that can be divided exactly by 60. +// Then divide by 60 to convert seconds into minutes. // e) What do you think the variable result represents? Can you think of a better name for this variable? - +// result represents the movie length converted from seconds into hours, minutes and seconds. // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer +// The code works correctly for positive whole numbers of seconds. +// However, it may not give a useful result for negative numbers, +// decimals, or values that are not numbers. From d3a6646742d3429e68c753368e39cb278d830da0 Mon Sep 17 00:00:00 2001 From: mrafeie Date: Sun, 6 Sep 2026 21:42:20 +0100 Subject: [PATCH 12/12] Enhance comments for pence to pounds conversion Added comments to explain the steps for converting pence to pounds. --- Sprint-2/3-mandatory-interpret/3-to-pounds.js | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js index 60c9ace69..b56ad2544 100644 --- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js +++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js @@ -25,3 +25,8 @@ console.log(`£${pounds}.${pence}`); // To begin, we can start with // 1. const penceString = "399p": initialises a string variable with the value "399p" +// 2. penceString.substring(0, penceString.length - 1): Removes the final character ("p") from the string. +// 3. padStart(3, "0"): Makes sure the number contains at least 3 characters. If it has fewer than 3 characters, zeros are added to the beginning. +// 4. substring(0, paddedPenceNumberString.length - 2): Gets everything except the final two characters. The final two characters represent the pence. +// 5. substring(paddedPenceNumberString.length - 2): Gets the final two characters of the string. +// 6. console.log(...): Combines the pounds and pence into a price format.