From f0db277b6ce51502a93a1e6ef80ec224eeb81753 Mon Sep 17 00:00:00 2001 From: Qhama Gwele Date: Fri, 18 Sep 2026 13:03:48 +0200 Subject: [PATCH 1/5] Complete 1-key-exwecises in Sprint-2 --- Sprint-2/1-key-exercises/1-count.js | 2 ++ Sprint-2/1-key-exercises/2-initials.js | 3 ++- Sprint-2/1-key-exercises/3-paths.js | 6 ++++-- Sprint-2/1-key-exercises/4-random.js | 14 ++++++++++---- 4 files changed, 18 insertions(+), 7 deletions(-) diff --git a/Sprint-2/1-key-exercises/1-count.js b/Sprint-2/1-key-exercises/1-count.js index 117bcb2b6..8437e730c 100644 --- a/Sprint-2/1-key-exercises/1-count.js +++ b/Sprint-2/1-key-exercises/1-count.js @@ -4,3 +4,5 @@ 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 + +// Line 3 takes the current value of count (0), adds 1 to it (0 + 1 = 1), and uses the assignment operator (=) to reassign and store this new value (1) back into the count variable. \ No newline at end of file diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js index 964c9563c..5d6fa589b 100644 --- a/Sprint-2/1-key-exercises/2-initials.js +++ b/Sprint-2/1-key-exercises/2-initials.js @@ -5,6 +5,7 @@ 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]; +console.log(initials); // https://www.google.com/search?q=get+first+character+of+string+mdn diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js index ab90ebb28..5f87d5e97 100644 --- a/Sprint-2/1-key-exercises/3-paths.js +++ b/Sprint-2/1-key-exercises/3-paths.js @@ -17,7 +17,9 @@ 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(".")); +console.log(dir); +console.log(ext); // https://www.google.com/search?q=slice+mdn \ No newline at end of file diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js index 292f83aab..3c42df6b7 100644 --- a/Sprint-2/1-key-exercises/4-random.js +++ b/Sprint-2/1-key-exercises/4-random.js @@ -3,7 +3,13 @@ const maximum = 100; const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum; -// In this exercise, you will need to work out what num represents? -// 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 +console.log(num); +// what does num represent? +// num represents a random whole number (integer) between minimum (1) and maximum (100) inclusive. + +//Breakdown of the expression: +// 1. Math.random() generates a decimal number from 0 (inclusive) up to, but not including, 1. +// 2. (maximum - minimum + 1) calculates the range size (100 - 1 + 1 = 100). +// 3. Math.random() * 100 scales the random decimal to a range between 0 and 99.999... +// 4. Math.floor() rounds that value down to the nearest whole integer (0 to 99). +// 5. + minimum (+ 1) shifts the final value up into the target range of 1 to 100. From ba171acf5985ce3f382c910cd461ec74d183bb3d Mon Sep 17 00:00:00 2001 From: Qhama Gwele Date: Fri, 18 Sep 2026 13:36:52 +0200 Subject: [PATCH 2/5] Fix all bugs in 2-mandatory-errors --- Sprint-2/2-mandatory-errors/0.js | 4 ++-- Sprint-2/2-mandatory-errors/1.js | 4 +++- Sprint-2/2-mandatory-errors/2.js | 4 +++- Sprint-2/2-mandatory-errors/3.js | 4 +++- Sprint-2/2-mandatory-errors/4.js | 7 +++++-- 5 files changed, 16 insertions(+), 7 deletions(-) diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js index cf6c5039f..65ad3030d 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? \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js index 7a43cbea7..6ef2ea979 100644 --- a/Sprint-2/2-mandatory-errors/1.js +++ b/Sprint-2/2-mandatory-errors/1.js @@ -1,4 +1,6 @@ // trying to create an age variable and then reassign the value by 1 -const age = 33; +let age = 33; age = age + 1; + +console.log(age); diff --git a/Sprint-2/2-mandatory-errors/2.js b/Sprint-2/2-mandatory-errors/2.js index e09b89831..642071c16 100644 --- a/Sprint-2/2-mandatory-errors/2.js +++ b/Sprint-2/2-mandatory-errors/2.js @@ -1,5 +1,7 @@ // Currently trying to print the string "I was born in Bolton" but it isn't working... // what's the error ? +// Answer: cityOfBirth was referenced before it was declared (ReferenceError). -console.log(`I was born in ${cityOfBirth}`); const cityOfBirth = "Bolton"; +console.log(`I was born in ${cityOfBirth}`); + diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js index ec101884d..a13cdaf79 100644 --- a/Sprint-2/2-mandatory-errors/3.js +++ b/Sprint-2/2-mandatory-errors/3.js @@ -1,6 +1,8 @@ -const cardNumber = 4533787178994213; +const cardNumber = "4533787178994213"; const last4Digits = cardNumber.slice(-4); +console.log(last4Digits); + // The last4Digits variable should store the last 4 digits of cardNumber // However, the code isn't working // Before running the code, make and explain a prediction about why the code won't work diff --git a/Sprint-2/2-mandatory-errors/4.js b/Sprint-2/2-mandatory-errors/4.js index 5f86c730b..c24e9c352 100644 --- a/Sprint-2/2-mandatory-errors/4.js +++ b/Sprint-2/2-mandatory-errors/4.js @@ -1,2 +1,5 @@ -const 12HourClockTime = "8:53pm"; -const 24hourClockTime = "20:53"; +const twelveHourClockTime = "8:53pm"; +const twentyFourHourClockTime = "20:53"; + +console.log(twelveHourClockTime); +console.log(twentyFourHourClockTime); \ No newline at end of file From 18a49025c5f5437c4353f40e65556f12d60f4584 Mon Sep 17 00:00:00 2001 From: Qhama Gwele Date: Fri, 18 Sep 2026 18:48:58 +0200 Subject: [PATCH 3/5] Complete 3-mandatory-interpret exercises --- .../3-mandatory-interpret/1-percentage-change.js | 15 ++++++++++++--- Sprint-2/3-mandatory-interpret/2-time-format.js | 7 ++++++- Sprint-2/3-mandatory-interpret/3-to-pounds.js | 13 +++++++++++-- 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js index e24ecb8e1..a4446ee7a 100644 --- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js +++ b/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 +12,20 @@ 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 +// Answer: There are 5 function/method calls across 3 lines: +// - Line 4: replaceAll(",", "") and Number(...) +// - Line 5: replaceAll(",", "") and Number(...) +// - Line 10: console.log(...) -// 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? +// 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? +// Answer: On line 5, there is a typo in replaceAll(",", "") where the comma is outside the quotes or contains empty space before the closing quote (""")). +// Fix line 5 by changing it to: priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", "")); // c) Identify all the lines that are variable reassignment statements +// Answer: Lines 4 and 5 (carPrice = ... and priceAfterOneYear = ...) // d) Identify all the lines that are variable declarations +// Answer: Lines 1, 2, 7, and 8 (let carPrice, let priceAfterOneYear, const priceDifference, const percentageChange) -// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? +// e) Describe what the expression Number(carPrice.replaceAll(",", "")) is doing – what is the purpose of this expression? +// Answer: .replaceAll(",", "") removes the comma from the price string ("10,000" becomes "10000"), and Number(...) converts that clean string into a numeric value so mathematical calculations can be performed on it \ No newline at end of file diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js index 47d239558..9363c4814 100644 --- a/Sprint-2/3-mandatory-interpret/2-time-format.js +++ b/Sprint-2/3-mandatory-interpret/2-time-format.js @@ -12,14 +12,19 @@ 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? +// Answer: 6 variable declarations (movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, result). // b) How many function calls are there? +// Answer: 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 +// Answer: % is the remainder (modulo) operator. It calculates the leftover seconds when movieLength is divided into full minutes (60-second chunks). // d) Interpret line 4, what does the expression assigned to totalMinutes mean? +// Answer: It subtracts the leftover seconds from the total movie length to get a exact multiple of 60, then divides by 60 to convert that duration into whole minutes. // e) What do you think the variable result represents? Can you think of a better name for this variable? +// Answer: It represents the movie length formatted as a HH:MM:SS time string. A clearer name would be formattedTime or formattedMovieLength. // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer +// Answer: It works for all non-negative numbers representing total seconds. However, if movieLength is negative or not a number (e.g., a string or null), it will output invalid time values or NaN. \ No newline at end of file diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js index 60c9ace69..fbe7e8785 100644 --- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js +++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js @@ -23,5 +23,14 @@ console.log(`£${pounds}.${pence}`); // You need to do a step-by-step breakdown of each line in this program // Try and describe the purpose / rationale behind each step -// To begin, we can start with -// 1. const penceString = "399p": initialises a string variable with the value "399p" +// 1. const penceString = "399p": Initialises a string variable with the value "399p" representing the price in pence including the trailing letter 'p'. + +// 2. const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1): Extracts the numeric portion of the pence string by taking characters from index 0 up to (but not including) the last character, removing the 'p' ("399"). + +// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"): Ensures the pence string is at least 3 digits long by adding leading zeros if necessary (e.g., "5" becomes "005"), ensuring there are enough digits to extract both pounds and pence. + +// 4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2): Extracts the pounds portion of the price by taking all digits except the last two ("3"). + +// 5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"): Extracts the last two digits representing pence ("99") and ensures it is padded to 2 digits. + +// 6. console.log(`£${pounds}.${pence}`): Formats and prints the final price string with the pound symbol, pounds amount, period, and pence amount ("£3.99"). \ No newline at end of file From dc12eda1d14307dd7397e067fe33adb776db817c Mon Sep 17 00:00:00 2001 From: Qhama Gwele Date: Fri, 18 Sep 2026 19:16:13 +0200 Subject: [PATCH 4/5] Complete chrome.md stretch exercise --- Sprint-2/4-stretch-explore/chrome.md | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Sprint-2/4-stretch-explore/chrome.md b/Sprint-2/4-stretch-explore/chrome.md index 962580b82..3629b5ef1 100644 --- a/Sprint-2/4-stretch-explore/chrome.md +++ b/Sprint-2/4-stretch-explore/chrome.md @@ -8,8 +8,10 @@ Let's try an example. In the Chrome console, invoke the function `alert` with one argument, the string `"Hello world!"`; What effect does calling the `alert` function have? - +Answer: Calling alert("Hello world!") displays a pop-up dialog box in the browser window containing the message "Hello world!" and an "OK" button that pauses script execution until dismissed. Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`. - What effect does calling the `prompt` function have? +Answer: Calling prompt("What is your name?") displays a pop-up dialog box containing the message, a text input field, an "OK" button, and a "Cancel" button. + What is the return value of `prompt`? +Answer: It returns the string entered by the user in the input field when they click "OK". If the user clicks "Cancel" or closes the dialog, it returns null. From a6050ecdbc1ca765d7c0084ea36fa86351db2a19 Mon Sep 17 00:00:00 2001 From: Qhama Gwele Date: Fri, 18 Sep 2026 19:20:19 +0200 Subject: [PATCH 5/5] Complete objects.md stretch exercise --- Sprint-2/4-stretch-explore/objects.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Sprint-2/4-stretch-explore/objects.md b/Sprint-2/4-stretch-explore/objects.md index 0216dee56..42f9ba535 100644 --- a/Sprint-2/4-stretch-explore/objects.md +++ b/Sprint-2/4-stretch-explore/objects.md @@ -5,12 +5,18 @@ In this activity, we'll explore some additional concepts that you'll encounter i Open the Chrome devtools Console, type in `console.log` and then hit enter What output do you get? +Answer: It outputs the function definition itself, showing `ƒ log() { [native code] }`. Now enter just `console` in the Console, what output do you get back? +Answer: It returns the `console` object containing various built-in properties and logging methods. Try also entering `typeof console` +Answer: It outputs `"object"`. Answer the following questions: What does `console` store? +Answer: `console` is a built-in global object that stores properties and methods used to output messages, errors, and warnings to the browser console. + What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? +Answer: The dot (`.`) is the property accessor operator. It is used to access specific methods (`log`, `assert`) attached to the `console` object. \ No newline at end of file